Chemical Process Flashcards by Kris Daclan

Oxidation of SO2 to SO3 is favoured by
low temperature and low pressure.
low temperature and high pressure.
high temperature and low pressure.
high temperature and high pressure.

low temperature and high pressure.

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Gun powder, which is an explosive comprises of charcoal, sulphur and
glycerene
salt petre
nitro glycerene
dynamite

salt petre

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Starting raw material for the manufacture of alum is
alumina
gypsum
bauxite
ammonium bicarbonate

bauxite

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Salt cake is chemically represented by
Na2SO4
CaSO4.H2O
MgSO4
BaSO4

Na2SO4

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Which of the following sugars is the sweetest?
Glucose
Fructose
Sucrose
Lactose

Fructose

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Paper pulp produced by kraft/sulphate process is
bleached easily
dull white in color
strong fibrous
dark colored

strong fibrous

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Claude process of gas liquefaction employs
merely compression of gas beyond its critical pressure.
Joule-Thomson expansion cooling.
heat exchange with colder stream.
adiabatic expansion against a piston or in a turbine.

adiabatic expansion against a piston or in a turbine.

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The main use of HCl is in the
drilling of petroleum wells and pickling of steel sheets.
manufacture of cationic detergent.
treatment of spent fuel of nuclear reactor.
none of these.

drilling of petroleum wells and pickling of steel sheets.

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The gasification reaction represented by, C + H2O = CO + H2, is a/an __________ reaction.
exothermic
endothermic
catalytic
autocatalytic

endothermic

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Viscose rayon is chemically
cellulose nitrate
regenerated cellulose nitrate
cellulose acetate
regenerated cellulose acetate

regenerated cellulose acetate

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All enzymes are made of
fats
carbohydrates
proteins
amino acids

proteins

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The combustion reaction, C + O2 = CO2, is
exothermic
endothermic
autocatalytic
none of these

exothermic

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Styrene is produced from ethyl benzene by the process of
dehydrogenation
oxidation
alkylation
dehydration

dehydrogenation

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Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of
callagen
tannin
molasses
carbohydrate

callagen

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The chamber process is
preferred over contact process for producing 98 to 100% H2SO4 and various oleums.
non-catalytic and operates only on pyrites.
a batch process for directly producing high strength (98 to 100%) H2SO4.
none of these.

none of these.

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Sucrose content in the raw juice extracted from sugar cane is about __________ percent.
1 - 2
15 - 20
50 - 60
80 - 85

15 - 20

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Fusel oil is a/an
essential oil.
extract from medicinal herbs.
mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses).
none of these.

mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses).

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Styrene-butadiene-rubber (SBR) as compared to natural rubber has
Poorer tensile strength.
poorer resistance to oxidation.
greater amount of heat build-up under heavy loading.
all (a), (b) and (c).

all (a), (b) and (c).

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Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.
CaO
MnO2
ZnO
FeS

ZnO

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The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
dilute H2SO4
oleum
ultraviolet light
none of these

oleum

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Haemoglobin is a/an
amino acid
biological catalyst
protein
enezyme

protein

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Epoxy resin
is a good adhesive.
is an elastomer.
cannot be used for surface coatings.
is a polyester.

is a good adhesive.

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Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.
10
25
50
98

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Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?
High cost of mercury.
High specific gravity of mercury.
Non-availability of high purity mercury.
Pollution of water stream by mercury.

Pollution of water stream by mercury.

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Esterification reaction produces detergent vanaspati soap mercaptans

soap

Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials. adsorbs oxidises reduces converts

adsorbs

Producer gas consists mainly of CO, CO2 N2, H2 CO, H2 H2, CH4 C2H2, CO2, H2

CO, CO2 N2, H2

Neoprene is the trade name of polyurathane phenol formaldehyde polychloroprene styrene-butadiene rubber

polychloroprene

Hard water does not affect the lather formation by soap. is not unfit for drinking purpose. pollutes the water stream. all (a), (b) and (c).

is not unfit for drinking purpose.

Which of the following is an organo-metal-lic compound ? Isopropyl alcohol Tetra-ethyl lead Zeolite Cumene

Tetra-ethyl lead

Sulphur addition in soap is done to improve the soap texture. cure pimples & dandruff. fasten lather formation. increase its cleansing action.

cure pimples & dandruff.

Phosphate rock is a raw material for the manufacture of phosphoric acid phosphorous superphosphates all (a), (b) and (c)

all (a), (b) and (c)

Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its poor oxidation stability and high gum forming tendency. greater tendency of decomposition at elevated temperature. hydrolysis tendency in presence of water. all (a), (b) and (c).

all (a), (b) and (c).

Which of the following is not a raw material used for the manufacture of ordinary glass? Iron oxide Soda ash Limestone Silica

Iron oxide

Esterification reaction produces soap. is reversible. is a reaction between an alcohol and an organic acid. all (a), (b) and (c).

all (a), (b) and (c).

In sulphate pulp manufacture, the pressure and temperature in the digestor is 10 atm., 800 °C 10 atm., 170-180°C 1 atm., 170 - 180°C l atm., 800°C

10 atm., 170-180°C

Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of calcium sulphate sodium chloride sodium sulphate magnesium chloride.

sodium chloride

Pick out the endothermic reaction out of the following. C+O2 = CO CO + 3H2 = CH4 + H2O CaCO3 = CaO + CO2 CO +O2 = CO2

CaCO3 = CaO + CO2

Pasteurisation of milk means removal of fatty and albuminous substance from it. killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics. inhibiting the growth of micro-organisms without killing them. none of these.

killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.

Fusion of bauxite and __________ produces high alumina cement. alum limestone coke quartz

limestone

__________ process is used for the manufacture of sodium carbonate by ammonia soda process. Ostwald's Bosch Solvay Haber's

Solvay

Polycaprolactum is commercially known as nylon-6 nylon-66 dacron rayon

nylon-6

Frasch process is for making oxygen producing helium mining sulphur making nitrogen

mining sulphur

Very fine suspended and colloidal impurities are removed from water by a process called sedimentation coagulation disinfection softening

coagulation

Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because its calorific value is very less. tar neutralises the residual acids present in pitch. it reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop. all (a), (b) and (c).

it reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop.

Which is the main reducing agent during production of iron from iron ore in a blast furnace ? C CO CO2 H2

The drug used in contraceptives is sulphadizene mestranol methyl salicylate pencillin

mestranol

Raw materials used for producing __________ cement does not contain iron oxide. waterproof slag white pozzolan

white

In the Lurgi coal gasifier coking coals cannot be used. low carbon conversion efficiency is achieved. entrainment of solids is higher. large quantity of coal can be processed.

large quantity of coal can be processed.

Neon gas is flammable in nature. used in color discharge tube. filled in lamps having tungsten filament. all (a), (b) and (c).

used in color discharge tube.

Calgon used in water treatment is chemically sodium phosphate sodium hexametaphosphate calcium phosphate tricresyl phosphate

sodium hexametaphosphate

Which oil is preferred for paint manufacture ? Drying oil Non-drying oil Semi-drying oil Saturated oil

Drying oil

Styrene butadiene rubber (SBR) is a natural rubber. a synthetic polymer. a synthetic monomer. another name of silicone rubber.

a synthetic polymer.

Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at 1 atm & 100°C 5 atm & 275°C 100 atm & 500°C 50 atm & 1000°C

5 atm & 275°C

Glycerine is not used in the manufacture of explosive. conditioning and humidification of tobacco. manufacture of pharmaceuticals. none of these.

none of these.

Cumene is the starting material for the production of benzoic acid phenol and acetone isoprene styrene

phenol and acetone

The type of high refractive index glass used in optical instruments is __________ glass. pyrex flint crookes none of these

flint

Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale. nickel vanadium alumina iron

vanadium

Most commonly used rubber vulcanising agent is sulphur bromine platinum alumina

sulphur

Terylene is same as dacron a polyester both (a) & (b) neither (a) nor(b)

both (a) & (b)

Free alkali in a toilet soap is __________ that in a laundary shop. less than more than same none of these

less than

Dehydrogenation of isopropanol produces propyl alcohol acetone trichloroethylene formaldehyde

acetone

Pick out the wrong statement. Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action. Soap powder is prepared by mixing soap with hydrated sodium carbonate. Detergents differ from soaps in their action in hard water. Tarnish inhibitor (e.g., benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc.

Tarnish inhibitor (e.g., benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc.

Concentration of hydrogen peroxide is done by crystallisation vacuum crystallisation atmospheric distillation dehydration

vacuum crystallisation

Helium is produced on commercial scale from air natural gas coke oven gas none of these

natural gas

Fermentation of molasses to produce ethyl alcohol is done at __________ °C 20 - 30 < - 5 100 - 150 250 - 300

20 - 30

The catalyst used in the manufacture of DDT is alumina. silica. 20% oleum. aluminium chloride.

20% oleum.

Most widely and commonly used coagulant for the removal of suspended impurities in water is bleaching powder slaked lime alum copper sulphate

alum

_________ is used as a catalyst in fat splitting. ZnO Ni V2O5 FeO

ZnO

Which of the following is not produced on commercial scale from sea water? Bromine. Magnesium compounds. Potassium compounds. Sodium sulphate.

Sodium sulphate.

Heating of __________ to 120°C, produces plaster of paris. blue vitriol gypsum calcium silicate calcium sulphate

gypsum

Pick out the wrong statement. Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98%. The chemical formula of oleum is H2S2O7, which is formed by saturating sulphuric acid with sulphur trioxide. Vitriol oil is nothing but technical sulphuric acid. Decomposition of sulphuric acid on heating does not start before its boiling.

Decomposition of sulphuric acid on heating does not start before its boiling.

Which of the following has sodium bicarbonate as its main constituent ? Baking soda Baking powder Washing soda none of these

Baking powder

Ordinary glass is not a/an amorphous isotropic material. supercooled liquid. material with sharp definite melting point. electrical insulator.

material with sharp definite melting point.

In premitive days, __________ was being manufactured by Leblanc Process. alum washing soda soda ash calcium carbide

soda ash

The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at SASOL (in South Africa). Redcar (U.K.). Los-Angles (U.S.A.). Trombay (India).

SASOL (in South Africa).

Lurgi coal gasifier is a pressurised __________ bed reactor. moving fixed fluidised entrained

moving

Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils cause cholesterol build up and blood clotting. are prone to rancid oxidation. always contain some amount of nickel (as their complete removal is very difficult). have affinity to retain harmful sulphur compounds.

cause cholesterol build up and blood clotting.

Paper grade bamboo contains about __________ percent cellulose. 5 20 40 60

Carboxymethyl cellulose (CMC) is added in detergents to act as a/an surfactant builder optical brightening agent anti soil redeposition agent

anti soil redeposition agent

Vulcanisation of rubber decreases its tensile strength. increases its ozone & oxygen reactivity. increases its oil & solvent resistance. converts its plasticity into elasticity.

converts its plasticity into elasticity.

Raw materials for 'Solvay Process' for manufacture of the soda ash are salt, limestone and coke or gas. ammonia, salt and limestone. ammonia limestone and coke. none of these.

salt, limestone and coke or gas.

Chloral is used in the manufacture of DDT BHC parathion none of these

DDT

Bromine is used in the preparation of fire extinguishing compounds. fire proofing agents. dyes and antiknock compounds. all (a), (b) and (c).

all (a), (b) and (c).

The process used for the manufacture of ethyl alcohol from molasses is distillation dehydration dehydrogenation none of these

none of these

Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent. 75 < 10 > 30 50

< 10

Absorption of SO3 in 97% H2SO4 is exothermic endothermic not possible none of these

exothermic

__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia. Solvay Ostwald's Haber's none of these

Ostwald's

Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the fertiliser manufacture car battery solution synthesis of oleum water treatment

car battery solution

The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is alumina silica gel platinum nickel

alumina

A good quality coal should have low fusion point of ash high ash content high sulphur content none of these

none of these

Zeolite used in water softening process (cation exchange) is regenerated by washing with brine chloramines sodium bisulphite liquid chlorines

brine

The catalyst used in shift converter is nickel vanadium silica gel alumina

nickel

Which of the following is a detergent ? Benzene hexachloride Alkyl benzene sulphonate Polytetraflouroethylene Cellulose nitrate

Alkyl benzene sulphonate

Drinking (potable) water treatment does not involve coagulation sedimentation softening disinfection

softening

Phenol formaldehyde resin is used as an adhesive in making laminates card boxes furniture books

laminates

Pick out the correct statement. A fat is converted into oil by its hydrogenation. There is no difference between a fat and an oil so far as its physical properties are concerned. All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms. Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content.

All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms.

DDT should not be allowed to come in contact with iron (during its manufacture) to avoid its decomposition. prevent sulphonation of the monochlorobenzene by the acid catalyst. achieve non-hygroscopic property. none of these.

avoid its decomposition.

Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively V2O5 & Cr2O3. oxides of nitrogen & Cr2O3. V2O5 on a porous carrier & oxides of nitrogen. oxides of nitrogen & V2O5 on a porous carrier.

oxides of nitrogen & V2O5 on a porous carrier.

DDT stands for diethyl-diphenyl-trichloromethane. dichloro-diphenyl-trichloromethane. diphenyl-dichloro-trichloromethane. dichloro-diphenyl-trichloroethane.

dichloro-diphenyl-trichloroethane.

Phosphoric acid is prepared from cryolite chalcopyrite rock phosphate none of these

rock phosphate

Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used as a lubricant. as a rust preventive. in hard water for cleaning of cloth. as a foam depressant in distillation column.

as a lubricant.

Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda ? Diaphragm electrolytic cell process Mercury electrolytic cell process Lime-soda process None of these

Lime-soda process

Bleaching action of bleaching powder is due to its __________ properties. reducing oxidising disinfecting none of these

oxidising

Solvent extracted oil has low free fatty acid content. is odourless. has more of unsaturates. none of these.

none of these.

Which of the following is not required in the manufacture of soda ash by Solvay process ? Ammonia Limestone Nitric acid None of these

Nitric acid

Saponification number of an oil or fat gives an idea about its molecular weight. is inversely proportional to its molecular weight. detects its adulteration. all (a), (b) & (c).

all (a), (b) & (c).

The purpose of tanning in leather industry is to stiffen the leather. smoothen the leather. make it flexible. impart water resistance.

stiffen the leather.

Lime and soda ash are added to water to remove bicarbonates & sulphates of calcium and magnesium. undersirable taste and odour. bacteria. its corrosiveness.

bicarbonates & sulphates of calcium and magnesium.

Kaoline is a/an refractory material synthetic resin artificial abrasive blue pigment

refractory material

Hydrogenation of edible vegetable oils is an exothermic reaction. increases their melting point. is done in presence of nickel catalyst. all (a), (b) and (c).

all (a), (b) and (c).

Phenol is mainly used to produce benzene. to produce phenol formaldehyde. to produce polyester resin. as a plasticiser for unsaturated polyster.

to produce phenol formaldehyde.

Main constituent of dolomite is CaCO3 MgCO3 K2CO3 Na2CO3

MgCO3

Conversion of CO to CO2 by steam in presence of a catalyst is called steam reforming. shift conversion. steam gasification. none of these.

shift conversion.

Refractory bricks having high thermal conductivity is desirable, when it is to be used in the L.D. converter blast furnace rotary kiln recuperator

recuperator

Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water. SO3 Cl2 NH3 SO2

Cl2

Plasticisers are added to paints to make it corrosion resistant. make glossy surface. give elasticity & prevent cracking of the film. increase atmospheric oxidation.

give elasticity & prevent cracking of the film.

Resistance to fusion of the refractory under a steady rising temperature condition is called spalling refractoriness both (a) & (b) neither (a) nor (b)

refractoriness

Portland cement consists mainly of CaO & SiO2 SiO2 & Al2O3 CaO & Al2O3 CaO & Fe2O3

CaO & SiO2

_________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant. Pyrex Soda lime Lead High silica

Pyrex

The amount of benzene present in pure benzol is about __________ percent. 30 50 70 90

Cumene (isopropyl benzene) is made by oxidation of napthalene. propylene alkylation of benzene. polymerisation of a mixture of benzene & propylene. none of these.

propylene alkylation of benzene.

Which of the following is not a pyrite ore? Celestite Galena Gypsum Siderite

Siderite

Mannheim furnace is used in the manufacture of hydrochloric acid. H2SO4 by Chamber process. calcium carbide. corundum.

hydrochloric acid.

Thermosetting materials: are cross-linked molecules. soften on application of heat. are solvent soluble. none of these.

are cross-linked molecules.

Pick out the wrong statement. Iodine value of an oil or fat is the number of grams of iodine taken up by 100 gm of oil or fat. a measure of its unsaturation. helpful in findings its adulteration & its suitability for making soap. independent of the type of oil, whether it is drying or non-drying.

independent of the type of oil, whether it is drying or non-drying.

Nickel is not used as a catalyst in the Fischer-Tropsch process. shift conversion. hydrogenation of oil. Ostwald's process of HNO3 manufacture.

Ostwald's process of HNO3 manufacture.

_________ iron is the purest form of iron. Cast Wrought Pig High silicon

Wrought

Enamels give good glossy finish. are same as varnish. are prepared from non-drying oil. do not contain pigment.

give good glossy finish.

Black liquor is converted into white liquor by evaporation and burning the concentrate followed by causticisation of products. multi-effect evaporation only. selective liquid extraction. extractive distillation.

evaporation and burning the concentrate followed by causticisation of products.

Varnish does not contain thinner pigment both (a) & (b) neither (a) nor (b)

pigment

Alcohol is produced by the oxidation of an aldehyde hydrolysis of an ether esterification of a fat none of these

hydrolysis of an ether

Varnish does not contain pigment thinner dryer anti-skimming agent

pigment

Polymerisation product of C2F4 (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called polyurethane silicone teflon epoxy resin

teflon

Solvent used for extraction of oil is hexane methyl ethyl ketone furfurol none of these

hexane

Insulin is an __________ drug. anti-malarial anti-TB antibiotic none of these

none of these

Liquor poisoning generally occurs due to the presence of __________ in it. ethyl alcohol impurities methyl alcohol carbonic acid

methyl alcohol

Neoprene is chemically known as polybutadiene styrene butadiene rubber (SBR) polyurathane polychloroprene

polychloroprene

Pick out the wrong statement. Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%. Contact process of sulphuric acid manufacture produces pure acid of concentration ≥ 98%. 75% oleum can be produced by distillation of 20% oleum. Contact process of sulphuric acid manufacture uses nickel as the catalyst.

Contact process of sulphuric acid manufacture uses nickel as the catalyst.

Pick out the wrong statement. Catalytic hydrogenation of carbon monoxide produces methyl alcohol. In nylon-6, the number 6 represents the total number of carbon atoms in the ring. Raw materials for DDT manufacture are benzene and chlorine. Ethanolamines are produced by using ammonia and ethylene oxide as raw material.

Raw materials for DDT manufacture are benzene and chlorine.

Molecular weights of polymers are in the range of 10^2 - 10^2 10^5 - 10^9 10^2 - 10^7 10^9 - 10^11

10^2 - 10^7

Sulphur removal by heating of pyrite ore in presence of air is called its reduction roasting calcination smelting

roasting

Deacon's method is used for the manufacture of glauber's salt common salt chlorine graphite electrode

chlorine

Pick out the true statement pertaining to water treatment. Slow sand filters can remove colour completely. Activated carbon can be used for taste & odour control without subsequent filtration. Application of activated carbon reduces the temporary hardness of water. Normally, the turbidity is removed by adding a coagulent prior to sedimentation.

Normally, the turbidity is removed by adding a coagulent prior to sedimentation.

Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass. lead borosilicate soda lime alkali silicate

borosilicate

Prussian blue is chemically represented by FeO.TiO2 Ca SO4 . 2H2O Fe4 [Fe (CN6)3] AlF3 . 3NaF

Fe4 [Fe (CN6)3]

Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of nitric acid hydrochloric acid methyl alcohol formic acid

nitric acid

The most stable allotropic form of phosphorous is the __________ phosphorous. white black yellow red

black

Function of thinner in a paint is to accelerate the oxidation of oil. prevent gelling of the paint. suspend pigments & dissolve film forming materials. form a protective film.

suspend pigments & dissolve film forming materials.

Starting material for the production of styrene butadiene rubber (SBR) is ethyl alcohol ethylene both (a) & (b) neither (a) nor (b)

both (a) & (b)

Which one of the following is not an elastomer ? Polyisoperene Neoprene Nitrile-butadiene None of these

None of these

Which of the following processes can remove both temporary as well as permanent hardness of water ? Filtration Boiling Distillation None of these

Distillation

Dacron is a condensation product of hexam-ethylene diamine and adipic acid. thermosetting material. condensation product of dimethyl terephthalate and ethylene glycol. none of these.

none of these.

Rancidity of the fatty oil can be reduced by its decoloration hydrogenation oxidation purification

hydrogenation

Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like high cost fragile nature easy poisoning tendency all (a), (b) and (c)

all (a), (b) and (c)

_________ of rubber decreases after its vulcanisation. Resistance to the action of organic solvent Tackiness Maximum service temperature Tensile strength

Tackiness

Boiling of water containing temporary hardness produces CO2 CaSO4 CaHCO3 none of these

CO2

Starting material for the commercial production of ethyl alcohol in India is rice molasses fruit of Mahua tree maize

molasses

Phenol formaldehyde employs addition polymerisation. employs condensation polymerisation. is a monomer. is an abrasive material.

employs condensation polymerisation.

Which of the following is not an insecticide? Hydrocyanic acid Nicotine Sodium flouride Hexane

Hexane

Shrinkage volume in cement setting does not depend upon the sand to cement ratio. water to cement ratio. ambient temperature fluctuation. drying period.

sand to cement ratio.

Bisphenol A is produced by the condensation of acetone with formaldehyde ethyl alcohol diethyl ether phenol

phenol

In Kraft process of paper manufacture, white cooking liquor consists of caustic soda sodium sulphide & sodium carbonate. sodium sulphite & sodium carbonate. sodium sulphite & sodium sulphide. none of these.

sodium sulphide & sodium carbonate.

Presence of carbonaceous matter in the sewage causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures. reduces sulphate ions to sulphides causing obnoxious smell. increases the quantity of chlorine used for its purification. all (a), (b) and (c).

all (a), (b) and (c).

A mineral is termed as 'ore', if a metal can be economically extracted from it. it contains ≥ 40% metal. the metal present in it is costly. all (a), (b) and (c).

a metal can be economically extracted from it.

In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst gives higher conversion efficiency. has a longer life and is not poisoned by arsenic. handles lower SO2 content gas (7 -10% SO2), thus increasing the capital cost of the plant. all (a), (b) and (c).

all (a), (b) and (c).

At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system ) P √P P2 1/P

√P

Oleum produces fumes of SO2 H2SO4 SO3 SO2 + H2SO4

SO3

20% oleum means that in 100 kg oleum, there are 20 kg of SO3 and 80kg of H2SO4. H2SO4 and 80kg of SO3. SO3 for each 100 kg of H2SO4. none of these.

SO3 and 80kg of H2SO4.

Chloramines are used in water treatment for disinfection and control of taste & odour. corrosion control. removing turbidity. control of bacteria.

disinfection and control of taste & odour.

Glycerine is recovered from lye by evaporation followed by vacuum distillation. liquid extraction technique. extractive distillation technique. none of these.

evaporation followed by vacuum distillation.

Inversion of sucrose produces fructose glucose both (a) & (b) neither (a) nor (b)

glucose

Enzymes are organic catalysts used in the __________ reactions. chemical biochemical photochemical electrochemical

biochemical

Linde process of gas liquefaction employs exchange of heat with colder stream. adiabatic expansion through a throttle valve (Joule-Thomson expansion). adiabatic expansion against a piston or in a turbine. merely compressing the gas beyond its critical pressure.

adiabatic expansion through a throttle valve (Joule-Thomson expansion).

Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent. 10 50 80 95

Ore concentration by froth floatation utilises the __________ of ore particles. density difference wetting characteristics terminal velocities none of these

wetting characteristics

The main use of activated carbon in water treatment is to control bacterial growth taste and odour turbidity none of these

taste and odour

The most commonly used substance to speed up the sedimentation of sewage is lime sulphuric acid chlorine sodium bisulphite

lime

Sucrose is a monosacchride disacchride polysacchride none of these

disacchride

Sugar content in sugarcane on cane basis is about __________ percent by weight. 1 to 5 5 to 10 15 to 20 20 to 30

5 to 10

Pick out the wrong statement. Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively. Protein catalysts are called enzymes. The rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes. Total sugar content in molasses is about 10%.

Total sugar content in molasses is about 10%.

The major use of butadiene is as a plasticiser for unsaturated polyester. in the manufacture of synthetic rubber. as an anti-skinning agent in paint. none of these.

in the manufacture of synthetic rubber.

The manufacture of Kraft pulp is done by a/an __________ process. alkaline acidic neutral none of these

alkaline

Antibiotic inhibits/destroys the growth of microorganisms. is used as a pain reliever. is an antimalarial. is an anaesthetic.

inhibits/destroys the growth of microorganisms.

Which of the following paper does not require a filler during manufacture ? Bond paper Writing paper Blotting paper Coloured paper

Blotting paper

Industrial production of chloroform requires acetone and phosgene calcium hypochlorite chlorine ammonium chloride

calcium hypochlorite

Pencillin, an antibiotic drug was discovered by Alexender Flaming Dr. Zivago none of these

Alexender

Styrene (a monomer for the production of polystyrene) is commercially produced by catalytic dehydrogenation of ethyl benzene. dehydration of ethyl alcohol followed by hydrogenation. reacting ethylene oxide with acetal-dehyde. fermentation of starch.

catalytic dehydrogenation of ethyl benzene.

Hydrogenation of oil takes place in a/an __________ reactor. autothermal trickle bed plug flow none of these

trickle bed

Fatty material used in soap making is fatty acid fatty alcohols tallow detergents

tallow

__________ glass is used for the manufacture of optical glass. Pyrex Soda Flint Crooke's

Flint

Thermosetting plastic materials can be repeatedly melted. is useful for melt casting. can not be melted after forming. is useful for spinning.

can not be melted after forming.

Favourable conditions for the liquefaction of gases in general are high pressure & low temperature. low pressure & high temperature. high pressure & high temperature. low pressure & low temperature.

high pressure & low temperature.

In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed : furnace → converter → absorber furnace → evaporator → absorber furnace → converter → evaporator converter → furnace → absorber

furnace → converter → absorber

_________ nature of hypo (sodium thiosulphate) makes it useful in photography. Oxidising Reducing Complex forming Photochemical

Complex forming

_________ is an ore of lead. Quartz Galena Siderite Chalcopyrite

Galena

Which of the following is an yellow pigment ? Titanium dioxide Ferrous sulphate Lead chromates Zinc sulphides

Lead chromates

Catalytic oxidation of toluene produces styrene phenol benzene tri-nitro-toluene

phenol

SO2 is bubbled through hot sugar cane juice to act as an acidifying agent. increase its concentration. increase the amount of molasses. increase the crystal size.

act as an acidifying agent.

The noble gas which occurs most abundantly in the atmosphere is helium neon krypton argon

argon

Main constituents of portland cement are calcium aluminate and gypsum silicates sodium silicate carbonates

silicates

Pick out the wrong statement. High early strength cement are made from materials having high silica to lime ratio. The function of gypsum in cement is to enhance its initial setting rate. Acid resistant cements are known as silicate cement. Major component of greyish portland cement is tricalcium silicate.

High early strength cement are made from materials having high silica to lime ratio.

Common salt is generally not produced commonly by __________ method from brine. freeze drying electrolytic solar evaporation vacuum evaporation

freeze drying

Which of the following is a detergent ? Fatty alcohol Alkyl benzene sulphonate (ABS) Fatty acids Methylene chloride

Alkyl benzene sulphonate (ABS)

Sulphuric acid is mainly used in the __________ industry. fertiliser steel paper paint

fertiliser

Pick out the wrong statement pertaining to nitric acid. About 90% of nitric acid is manufactured by Ostwald's process. It is a strong mono basic acid which reacts with almost all the metals except noble metals. Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2). Arc process of nitric acid manufacture is economical as compared to Ostwald's process.

Arc process of nitric acid manufacture is economical as compared to Ostwald's process.

Alcohol percentage in molasses may be around 10 40 70 85

Main use of hydrazine is as a rocket fuel in water treatment as a disinfectant as fire retardant

as a rocket fuel

Main use of liquid nitrogen is in rocket propulsion. making gun powder. detergent manufacture. refrigerative cooling.

refrigerative cooling.

Comparing sulphate process with sulphite process, we find that __________ in the latter. both temperature & pressure in the former is less than that both temperature & pressure in the former is more than that temperature is more in the former whereas pressure is more pressure is more in the former whereas temperature is less

both temperature & pressure in the former is more than that

Which of the following is a disaccharide ? Sucrose Glucose Starch Maltose

Sucrose

Proximate analysis of coal determines its __________ content. moisture, ash, sulphur & volatile matter moisture & volatile matter moisture, sulphur, nitrogen & fixed carbon none of these

moisture & volatile matter

Pick out the exothermic reaction out of the following: C + H2O = CO + H2 CaC2 + H2O = Ca(OH)2 + C2H2 MgCO3 = MgO + CO2 all (a), (b) and (c)

CaC2 + H2O = Ca(OH)2 + C2H2

__________ is produced using polycondensation reaction. Polythene Phenol formaldehyde Poly vinyl chloride none of these

Phenol formaldehyde

Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid. phthalic anhydride vinyl chloride maleic anhydride dacron

vinyl chloride

In industrial nomenclature, alcohol means butyl alcohol propyl alcohol ethanol methyl alcohol

ethanol

Which of the following is the purest form of water out of the following ? Underground water Rain water Well water Lake water

Rain water

Use of water having dissolved oxygen in boilers promotes corrosion sequestration scale formation none of these

corrosion

Unsaturated oils compared to saturated oils have lower melting point & higher reactivity to oxygen. higher melting point & higher reactivity to oxygen. lower melting point & lower reactivity to oxygen. higher melting point & lower reactivity to oxygen.

lower melting point & higher reactivity to oxygen.

With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide increases increases linearly decreases decreases linearly

decreases

Chemical formula of oleum is H2SO3 H2SO4 H2S2O7 H2SO7

H2S2O7

Electrodeposition of metals i.e. electroplating is never done on metals alloys refractories non-metals

refractories

Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre. cutting fibrillation hydration strengthening

strengthening

The biochemical treatment applied to sewage effluents is a process of dehydration reduction oxidation polymerisation

oxidation

Ultimate analysis of coal determines its __________ content. carbon, hydrogen, nitrogen & sulphur carbon, ash, sulphur & nitrogen carbon, sulphur, volatile matter & ash carbon, volatile matter, ash & moisture

carbon, hydrogen, nitrogen & sulphur

A cane sugar factory having sugar production rate of 10 tons/day will produce about __________ tons/day of bagasse (after consumption by the factory for heating etc.). 1 10 25 40

Sucrose content in cane sugar may be around __________ percent. 50 70 80 95

Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of final rolling out of paper. cutting of fibres. hydration of fibres. fibrillation of fibre.

final rolling out of paper.

Yellow glycerine is made into white, using activated carbon diatomaceous earth bauxite bentonite

activated carbon

Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C. -5 to 0 5 to 10 30 to 50 75 to 80

30 to 50

Brackish water which contains mostly dissolved salt, can be purified by the __________ process. reverse osmosis sand filter lime soda permutit

reverse osmosis

Major component of flint glass is lead oxide silica alumina soda

lead oxide

Gypsum is chemically calcium chloride potassium sulphate sodium sulphate calcium sulphate

calcium sulphate

Calcination of gypsum produces plaster of paris salt cake nitre cake lime

plaster of paris

Phthalic anhydride is produced by the oxidation of naphthalene benzene toluene aniline

benzene

Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance. flint soda pyrex potash

pyrex

Zeigler process produces high density polyethylene. produces low density polyethylene. uses no catalyst. employs very high pressure.

produces high density polyethylene.

Massecuite is used for paper making. used as a cattle feed. highly acidic in nature. none of these.

none of these.

Carbon content of pitch (residue of coal tar distillation) is around __________ percent. 70 55 80 94

Sodium salt of higher molecular weight fatty acid is termed as the __________ soap. hard soft metallic lubricating

soft

Synthetic glycerine is produced from toluene phenol propylene naphthalene

propylene

A 'unit process' is exemplified by the distillation hydrogenation of oils absorption humidification

hydrogenation of oils

Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4 + 4H2, is not practised, as it is a slow reaction. a discontinuous reaction (requiring regeneration of iron by water gas intermittently). still in development stage (by employing fluidised bed technique). all (a), (b) and (c).

all (a), (b) and (c).

Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to reduce its viscosity. increase its viscosity. reduce the variation in its viscosity with temperature. increase the variation in its viscosity with temperature.

reduce the variation in its viscosity with temperature.

Pick out the wrong statement pertaining to solvent extraction of oil.Rate of extraction decreases with decrease of thickness of the flakes. increases with the increasing flake size keeping the flake thickness constant. increases Considerably with the rise of temperature. decreases as the moisture content of flakes increases.

decreases as the moisture content of flakes increases.

Sea weeds are an important source of fluorine chlorine bromine iodine

iodine

Polythene is a/an __________ polymerisation product. addition condensation thermosetting none of these

addition

Catalytic oxidation-dehydrogenation of methyl alcohol produces formaldehyde phenol acetone maleic anhydride

formaldehyde

In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 2SO3), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to SO3 can be increased by increasing the oxygen concentration. putting more quantity of V2O5 catalyst in the converter. removing some quantity of SO3 during intermediate stage. maintaining low temperature & pressure in the converter.

removing some quantity of SO3 during intermediate stage.

Tall oil obtained as a by-product from the black liquor recovery is a black, sticky & viscous liquid. used in the manufacture of greases, emulsions & soaps. composed mainly of rosin & fatty acids. all (a), (b) & (c).

all (a), (b) & (c).

__________ is a polysacchride. Maltose Starch Sucrose Glucose

Starch

Styrene is produced from ethyl benzene by the process of dehydrogenation oxidation alkylation dehydration

dehydrogenation

Acetone is produced by catalytic dehydrogenation of phenol naphthalene isopropanol ethyl benzene

isopropanol

Nitrogen is an essential component of mineral salts carbohydrates fats proteins

proteins

Bromine content in sea water may be around __________ ppm. 70 640 1875 2500

Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is 0.14 0.34 0.94 1.4

0.94

Poly tetraflouro ethylene (P.T.F.E.) is known as bakelite teflon celluloid decron

teflon

Bakelite is same as poly tetrafluoroethylene (PTFE). an inorganic polymer. same as thermosetting phenol-formaldehyde. not a polymer.

same as thermosetting phenol-formaldehyde.

__________ is produced by the dehydrogenation of ethyl benzene. Styrene Ethyl alcohol Cumene Phenol

Styrene

Which of the following is used as a coagulant in water treatment ? Chloramine Chlorine Ferrous sulphate Hydrogen peroxide

Ferrous sulphate

__________ paper is used in the manufacture of newsprint paper. Groundwood Board Tissue Wrapping

Groundwood

Hydrogenation of vegetable oils is a/an __________ reaction. endothermic autocatalytic exothermic homogenous

exothermic

Permanent hardness of water is due to the presence of calcium & magnesium bi-carbonates sulphates & chlorides carbonate none of these

sulphates & chlorides

Concentration of sulphide ores is done usually by roasting smelting froth floatation electro magnetic separation

froth floatation

Dacron is a/an polyester unsaturated polyster polyamide inorganic polymer

polyester

Sodium carbonate (soda ash) is not used in the manufacture of fire extinguishers sugar baking powder detergents

detergents

Viscose rayon cannot be made from sulphite pulp. utilises H2SO4, NaOH and CS2 during its manufacture. cannot yield textile grade fibre. none of these.

utilises H2SO4, NaOH and CS2 during its manufacture.

Nylon 6-6 is manufactured from hexamethylene diamine and adipic acid. hexamethylene diamine and maleic anhydride. caprolactum. dimethyl terephthalate and ethylene glycol.

hexamethylene diamine and adipic acid.

Glauber's salt is chemically represented by Na2SO4.10H2O CaCl(OCl) CaSO4.H2O (NH4)2SO4

Na2SO4.10H2O

Chemical name of Grignard reagent is sodium thiosulphate. ethyl magnesium chloride. sodium sulphite. sodium bicarbonate.

ethyl magnesium chloride.

Which of the following processes is absent in glass manufacturing process ? Sintering Annealing Shaping or forming Melting

Sintering

Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood. 1 2.5 5 10

2.5

Dacron (or terylene) fibres as compared to nylon'fibres have better heat & acid resistant properties. poorer resistance to alkalis. poorer dyeability. all (a), (b) and (c).

all (a), (b) and (c).

Grignard reagent is chemically known as ethyl magnesium chloride. methyl magnesium chloride. dichlorophenol. monochloro acetic acid.

ethyl magnesium chloride.

The function of gypsum addition during cement making is to increase the density of cement. decrease the cement setting rate. both (a) and (b). neither (a) nor (b).

decrease the cement setting rate.

Low purity oxygen is used for L.D. steel making. cutting and welding of metals. medicinal purposes. chemical oxidation processes.

chemical oxidation processes.

_________ is produced using molasses as the starting raw material. Methyl alcohol Ethyl alcohol Benzol Dimethyl ether

Ethyl alcohol

Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have high electrical insulation properties. sharp melting points. low co-efficient of thermal expansion. compressive strength much greater than their tensile strengths.

sharp melting points.

A substance produced by a living organism and capable of anti-microbial activity is called a/an antibiotic antiseptic disinfectant none of these

antibiotic

Deaeration of water in its treatment is necessary, as it minimises its turbidity. helps in controlling its taste and odour. minimises its corrosiveness. none of these.

minimises its corrosiveness.

Hydrochloric acid is also known as oil of vitriol muriatic acid strong organic acid green acid

muriatic acid

Aryl benzene sulphonate (ABS) is a detergent. plasticiser for unsaturated polyester. starting material for the synthesis of glycerine. coating ingredient for photographic film.

detergent

Adipic acid is an intermediate in the manufacture of perspex nylon-66 polystyrene bakelite

nylon-66

The temperature in the calcium carbide furnace is __________ °C. 200-300 700-850 2000-2200 4000-4500

2000-2200

Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of 4 kgf/cm2 & 500°C. 10 kgf/cm2 & 1000°C. 40 kg/cm2 & 200°C. 100 kgi/cm2 & 500°C.

4 kgf/cm2 & 500°C.

Soaps remove dirt by increasing the surface tension. decreasing wettability. supplying hydrophyllic group. none of these.

none of these.

Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ? Xanthates Stearic acid Calcium & aluminium stearate Formic acid

Calcium & aluminium stearate

Chemical name of soda ash is sodium bicarbonate sodium thiosulphate potassium carbonate none of these

none of these

Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process. mechanical sulphate/kraft sulphite neutral sulphite semi-chemical

neutral sulphite semi-chemical

__________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace. Bauxite Limestone Quartz Manganese

Limestone

Gun powder uses sulphur charcoal potassium nitrate all (a), (b), & (c)

all (a), (b), & (c)

Dichloro diphenyl __________ is the full form of DDT (an insecticide). tetrachloroethane trichloroethane tetrachloromethane trichloromethane

trichloroethane

The basic difference between vegetable oils and fats is in their density chemical properties physical state composition

physical state

Which of the following is not a food additive? Citric acid Invertage Benzoyl peroxide Ammonium chloride

Ammonium chloride

Alum is commercially produced from gypsum feldspar galena bauxite

bauxite

CaO is called quick lime slaked lime limestone calcite

quick lime

Starting raw material for the manufacture of maleic anhydride is n-butene benzene either (a) or (b) neither (a) nor (b)

either (a) or (b)

Pick out the wrong statement. Fibrillation of fibre during paper manufacture is done to develop the strength in paper. Alkali consumption in digestion/cooking of bamboo is measured in terms of permangnate number. Bagasse fibre contains both lignin & cellulose. Presence of sodium sulphate in pulp makes the pulp bleachability poor.

Presence of sodium sulphate in pulp makes the pulp bleachability poor.

Which of the following contains least amount of N2 ? Coke oven gas Blast furnace gas Producer gas Water gas (blue gas).

Coke oven gas

Calcination of limestone is not done in a __________ kiln for producing lime. vertical shaft rotary fluidised bed fixed bed

fixed bed

Neoprene is a monomer synthetic rubber polyester none of these

synthetic rubber

Saponification value/number of an oil or fat is a measure of its fatty acid content. degree of unsaturation of the fatty acids present in it. average molecular weight. insoluble fatty acid content.

average molecular weight.

Ethyl alcohol cannot be produced from waste sulphite substrate of paper mills. by esterification and hydroloysis of ethylene. from molasses. none of these.

none of these.

Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C. 15-30 90-100 250-300 <0

15-30

Cement mainly contains CaO, SiO2, Al2O3 MgO, SiO2, K2O Al2O3, MgO, Fe2O3 CaO, MgO, K2O

CaO, SiO2, Al2O3

Sand and __________ is fused at 1300°C, to produce sodium silicate. limestone soda ash coke sodium sulphate

soda ash

Coke used for the production of calcium carbide should have low ash content. low ignition temperature. high electrical resistivity. all (a), (b) and (c).

all (a), (b) and (c).

Sucrose is a disaccharide consisting of glucose and glucose glucose and fructose glucose and galactose fructose and galactose

glucose and fructose

Function of sodium thiosulphate (hypo) in development of photographic film/plate is to brighten the faint images. remove metallic silver. convert silver chloride to silver. remove unexposed silver halide.

remove unexposed silver halide.

High temperature carbonisation of coal takes place at __________ °C. 2000 700 1100 < 500

1100

White phosphorous is stored under water, because it does not react with water. it is poisonous. its kindling temperature in dry air is very low. it is unstable.

its kindling temperature in dry air is very low.

__________ is not a constituent of gun powder. Carbon Charcoal Sulphur Potassium nitrate

Carbon

Hydrophilic group of a soap or detergent solution is water hating soil loving water loving none of these

water loving

Rotary kiln is not involved in the production of cement lime from limestone slaked lime from quick lime none of these

slaked lime from quick lime

Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C. 25 60-70 150-200 250-300

60-70

Vanillin is a type of anti-pyretic drug food preservative flavour dye

flavour

Temporary hardness of water can be removed by addition of alum (a coagulant). boiling. filtration (through gravity sand filter). addition of lime.

boiling

More than 100 percent of __________ is present in oleum. SO3 H2SO4 H2SO3 SO2

H2SO4

Pure rectified spirit contains about __________ percent alcohol. 45 70 95 99.5

Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C. -83 -183 -196 -218

-183

Titanium dioxide is a/an __________ colour pigment. white black yellow blue

white

Mercury cells for caustic soda manufacture, compared to diaphragm cells require lower initial investment. require more power. produce lower concentration NaOH. none of these.

none of these.

Cellulose percentage in bamboo fibre is about 10 20 50 85

Essential oils are usually obtained using steam distillation extractive distillation solvent extraction leaching

steam distillation

Impurities present in brine is normally removed by treatment with NH3 and CO2. lime and soda ash. lime, ammonia and carbon. all (a), (b) and (c).

all (a), (b) and (c).

Hydrogenation of oil/fat does not improve its resistance to rancid oxidation. raise its melting point. remove double bonds. none of these.

none of these.

Builders are added in soap to act as cleaning power booster anti-redeposition agent corrosion inhibitor fabric brightener

cleaning power booster

H2S is scrubbed from refinery gases by absorption using dilute H2SO4 ethanol amine chilled water tri-butyl phosphate

ethanol amine

Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction? Oxidation of Na+ ions Oxidation of Cl- ions Reduction of Na+ ions Reduction of Cl- ions

Oxidation of Cl- ions

Zeolite is a/an naturally occuring clay which is capable of exchanging cations. abrasive material. catalyst used in shift conversion. none of these.

naturally occuring clay which is capable of exchanging cations.

Type of glass used in optical work is the __________ glass. soda-lime fibre lead borosilicate

lead

Pick out the wrong statement pertaining to the soap manufacture. Transparent soaps are made by cold process. Organic pigments are used as colouring materials in the soap manufacture. Both laundary as well as toilet soaps are manufactured by hot process. Colourless rosin is used in the manufacture of laundary soaps.

Transparent soaps are made by cold process.

Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material ? Slag cement Glasses Porcelain/Potteries Teflon

Teflon

Glass is mainly CaO subjected to galvanising a super cooled liquid all (a), (b) and (c)

a super cooled liquid

Analgesic drugs are pain relievers antibiotics used in the treatment of T.B. used in the treatment of typhiod

pain relievers

Purity of oxygen used for blowing in steel making L.D. converter is 99.5%. The boiling point of oxygen is about __________ °C. -53 -103 -183 -196

-183

Commonly used glass is known as the __________ glass. flint hard pyrex soda

soda

Fusion of limestone and __________ produces high alumina cement. sand bauxite quicklime calcite

bauxite

Massacuits is a terminology used in the __________ industry. paint oil hydrogenation soap sugar

sugar

The basic constituent of vegetable oils is triglyceride fatty acids fatty alcohol mono esters

triglyceride

The most economical pulp for the production of newsprint would be the __________ pulp. groundwood sulphate sulphite semichemical

groundwood

Which of the following is the second major component of cement ? Al2O3 SiO2 CaO Fe2O3

SiO2

Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it has larger production capacity per unit cell. consumes less power per ton of Cl2 produced. produces high purity (70%) caustic soda directly. all (a), (b) and (c).

all (a), (b) and (c).

__________ are used as corrosion inhibitor for iron & steel in aqueous solutions. Phosphates Chromates Sulphates Bi-carbonates

Chromates

L.D. converter is used in the production of pig iron steel copper zinc

steel

The terminology 'BTX' used in coal tar distillation industry refers to benzol-toluol-xylol. benzol-toluene-xylene. benzene-toluol-xylol. benzene-toluene-xylene.

benzene-toluene-xylene.

Which of the following is not responsible for causing permanent hardness of water ? Ca(HCO3)2 CaCl2 MgCl2 none of these

Ca(HCO3)2

In the Solvay process, the product from the calciner is light soda ash dense soda ash sodium bicarbonate dehydrated soda ash

light soda ash

Commercially ethylene is produced from naphtha by catalytic cracking. catalytic dehydrogenation. pyrolysis. hydrocracking.

hydrocracking

Poly Vinyl Chloride (P.V.C.) is a __________ material. thermosetting thermoplastic fibrous chemically active

thermoplastic

Pig iron is produced by blast furnaces in India using mostly the iron ore named hematite magnetite siderite chalcopyrite

hematite

The difference between saponification value and acid value is: called ester value. always negative. constant for all fatty oils. none of these.

called ester value.

Fourdrinier machine is used in the manufacture of nylon-6 paper antibiotics sugar

paper

Pencillin is made employing __________ fermentation process. continuous aerobic batch anaerobic batch none of these

aerobic batch

Sulphuric acid saturated with SO3 is called concentrated H2SO4. sulphurous acid. oleum. none of these.

oleum

Nylon 66 is so named because the: average degree of polymerisation of the polymer is 1966. number of carbon atoms between two nitrogen atoms are 6. number of nitrogen atoms between two carbon atoms are 6 polymer was first synthesised in 1966.

average degree of polymerisation of the polymer is 1966.

Wet chlorine gas produced during electrolysis of brine is dehydrated by: spraying 66° Be H2SO4 counter current to the flow of the gas. passing it through a bed of diatomaceous earth. passing it through a bed of silica gel. none of these.

spraying 66° Be H2SO4 counter current to the flow of the gas.

CaSO4 .H2O is known as blue vitriol plaster of Paris gypsum zeolite

plaster of Paris

__________ of quicklime produces slaked lime. Hydration Dehydration Hydrogenation none of these

Hydration

Main product in calcium carbide-water reaction is Ca(OH)2 C2H2 CO2 CaCO3

C2H2

Glauber's salt is chemically calcium sulphate potassium sulphate potassium chlorate none of these

none of these

Which of the following fuel gases contains maximum amount of carbon monoxide ? Coke oven gas Water gas Blast furnace gas L.D. converter gas

L.D. converter gas

Baking soda is chemically represented by Na2CO3 NaHCO3 Na2CO3.H2O Na2CO3.10H2O

NaHCO3

P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as bakelite neoprene teflon nylon-66

teflon

Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo ? Depithing Digestion Bleaching None of these

Depithing

Percentage of glycerene present in the spent lye obtained during soap manufacture is about 0.5 5 20 35

Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent. 10 25 50 98

Commercial production of Vanaspati is done by __________ of edible vegetable oils. hydrogenation oxidation hydrolysis hydrocracking

hydrogenation

Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene ? AgO Al2O3 ZnCl2 Fe2O3

AgO

Phenolic antiseptics are added in the __________ soap. shaving medicated metallic transparent

medicated

Solvay process is used for the manufacture of caustic soda soda ash caustic potash soda lime

soda ash

A mixture of chlorine & sodium bromide acts as a/an insecticides analgesic drug fire retardant hydrogenation catalyst

fire retardant

Which is a high grade pulp ? Rag pulp Mechanical pulp Sulphate pulp Sulphite pulp

Sulphate pulp

Stereospecific agents are exemplified by radiation supported metal oxide catalysts ziegler catalysts all (a), (b) & (c)

all (a), (b) & (c)

Starting material for the production of butadiene in India is naphthalene benzol ethyl alcohol phthalic anhydride

ethyl alcohol

Yellow phosphorus is transported under air water nitrogen helium

water

Permanent hardness of water can be removed by simply boiling. adding alum. passing it through cation & anion exchangers. all (a), (b) and (c).

passing it through cation & anion exchangers.

Celluloid is chemically cellulose acetate regenerated cellulose cellulose nitrate cellulose acetate butyrate

cellulose nitrate

Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of nitric acid sulphuric acid ammonium sulphate hydrochloric acid

sulphuric acid

Which of the following is an explosive ? Nitroglycerene Trintrotoluene (TNT) Cellulose nitrate All (a), (b), and (c)

All (a), (b), and (c)

Zeolite is used in the: water treatment. glass manufacture. hydrogenation of fatty oil as a catalyst. development of exposed photographic plate.

water treatment.

Thermoplastic materials do not soften on application of heat. are heavily branched molecules. are solvent insoluble. none of these.

none of these.

Carbon tetrachloride (CCl4) is the starting raw material for the manufacture of trichloroethylene perchloroethylene parathion methanol

perchloroethylene

Salt is added in the kettle during soap manufacture to separate soap from lye. glycerine from lye. the metallic soap. the unsaponified fat from soap.

soap from lye.

Manufacture of phthalic anhydride uses __________ as a catalyst. Ni Cr V2O5 Al2O3

V2O5

Which of the following is not a product of coal tar distillation ? Anthracene Cresote oil Carbolic oil None of these

None of these

Teflon is: phenol formaldehyde. an inorganic polymer. poly tetrafluoroethylene (P.T.F.E.). a monomer.

poly tetrafluoroethylene (P.T.F.E.).

Chrome tanning and vegetable tanning are done for: light & heavy leather respectively. heavy & light leather respectively. both light & heavy leather. neither light nor heavy leather.

light & heavy leather respectively.

Catalyst used during the manufacture of 'Vanaspati Ghee' is: zinc nickel platinum copper

nickel

Iron ore hametite is concentrated using electro magnetic separation mainly. gravity separation. froth floatation. roasting.

gravity separation.

Refractory bricks burnt at very high temperature have got greater resistance to corrosion by slags. less resistance to corrosion by slags. high spalling tendency. none of these.

greater resistance to corrosion by slags.

Nitrile rubber is produced by the polymerisation of acrylonitrile and butadiene. acrylonitrile and styrene. isobutylene and isoprene. none of these.

acrylonitrile and butadiene.

Carbon disulphide is mainly used in the production of viscose rayon. corundum. plasticiser for unsaturated polyester. paints.

viscose rayon.

99.5% purity oxygen is used in cutting and welding by oxy-acetylene flame. hospitals for medicinal purposes. gas masks and artificial breathing apparatus. all (a), (b), and (c).

all (a), (b), and (c).

Nylon-6 is manufactured from caprolactum. hexamethylene diamine and adipic acid. hexamethylene diamine and maleic anhydride. hexamethylene diamine and sebacic acid.

caprolactum

Permanent hardness of water can be removed by boiling. adding Ca(OH)2. boiling it with Na2CO3. none of these.

boiling it with Na2CO3.

Sizing material is incorporated in paper to: impart resistance to penetration by liquids. increase its thickness. increase its flexibility & opacity. increase its brightness.

impart resistance to penetration by liquids.

Pick out the wrong statement. Pasteurisation of milk involves moderate heating followed by cooling. Bakeries and breweries make use of yeasts. Enzyme is a complex nitrogenous compound. Oils and fats are alkaloids.

Oils and fats are alkaloids.

Which of the following, when pyrolysed, produces perchloro-ethylene ? Ethylene dichloride Chlorobenzene Carbon tetrachloride Chlorinated paraffin

Carbon tetrachloride

Chemical name of aspirin (an analgesic drug) is acetylsalicylic acid nictonic acid calcium acetate methyl salicylate

acetylsalicylic acid

Which is the most efficient absorbant for SO3 out of the following ? 20% oleum 65% oleum 78%H2SO4 98%H2SO4

98%H2SO4

Coal tar is used as a: binding material for coal briquettes. fuel in rotary kiln. binder in making carbon electrodes. all (a), (b) and (c).

binding material for coal briquettes.

Caprolactum (a raw material for nylon-6 manufacture) is produced from phenol naphthalene benzene pyridine

benzene

The purpose of adding Na2CO3 to water of low alkalinity is to permit the use of alum as a coagulant. increase the softening capacity of zeolite. facilitate easy regeneration of zeolite. all (a), (b) and (c).

permit the use of alum as a coagulant.

Ca(OH)2 is called quicklime slaked lime limestone gypsum

slaked lime

Percentage of uranium in carnotite ore found in Jadugoda (Jharkhand) is about 0.1 to 0.5 1 to 5 5 to 10 15 to 25

0.1 to 0.5

Potassium is kept & transported under water liquid ammonia kerosene oil alcohol

kerosene oil

The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by electrolysis electrolytic reduction electrolytic oxidation none of these

electrolytic reduction

Bakelite is chemically known as polyvinyl chloride (PVC) polybutadiene phenol formaldehyde polyurathane

phenol formaldehyde

Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine ? Na2CO3 NaHCO3 H2 none of these

Phthalic anhydride is made by the oxidation of naphthalene. oxidation of benzene. dehydrogenation of ethyl benzene. none of these.

oxidation of naphthalene.

RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically: cyclo trimethylene trinitramine. trinitro resorcinol. cyclo tetramethylene tetranitramine. trinitro benzene.

cyclo trimethylene trinitramine.

Raw material used in alcohol distilleries is: molasses benzol methylated spirit none of these

molasses

Oil produced by solvent extraction has low free fatty acid content. is odourless. both (a) &(b). neither (a) nor (b).

neither (a) nor (b).

High acid value of an oil or fat is an indication of storage under improper conditions. absence of unsaturation. its smaller molecular weight. none of these.

storage under improper conditions.

Yeast is used in the manufacture of pencillin antibiotics wine pasteurised milk

wine

Liquefaction of gases can not be done by exchange of heat with colder stream. adiabatic expansion through a throttle valve (Joule-Thomson expansion). merely compressing it beyond critical pressure. adiabatic expansion against a piston or in a turbine.

merely compressing it beyond critical pressure.

Anion exchanger is regenerated usually with NaOH H2SO4 hydrazine alum solution

NaOH

_________ is the major constituent of the Portland cement. Calcium carbonate Calcium oxide Tricalcium silicate Calcium sulphate

Tricalcium silicate

Catalytic oxidation of naphthalene produces styrene phenol phthalic anhydride none of these

phthalic anhydride

Parathion and Malathion are pesticides. plasticisers for unsaturated polysters. pain-relieving drugs (analgesic). tranquilisers.

pesticides

Transparent soaps (e.g. Pears) are: usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency. metallic soaps with frothing agent and free stearic acid to achieve transparency. metallic soaps with frothing agent from which glycerine has not been recovered. none of these.

usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency.

Dehydrogenation of ethyl benzene produces styrene naphthalene phenol benzoic acid

styrene

Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces nylon-6 dacron polyester PVC

dacron

Lindane is not a fumigant. BHC (Benzene Hexa Chloride) containing 99% γ-isomer. a by-product of BHC manufacture. both(b) and (c).

BHC (Benzene Hexa Chloride) containing 99% γ-isomer.

Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate: is prone to thermal decomposition. has high water solubility and is unstable. is soluble in ammonium chloride and potassium chloride solution. all (a), (b) and (c).

is soluble in ammonium chloride and potassium chloride solution.

Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc? Sodium silicate Sodium borate Sodium tripolyphosphate (STPP) Caustic soda

Sodium borate

In the production of soda ash by Solvay process, the by-product is CaCl2 NH4Cl NH3 NaOH

CaCl2

The ideal pulp for the manufacture of paper should have high __________ content. cellulose lignin both (a) & (b) none of these

cellulose

At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants. independent of directly proportional to inversely proportional to proportional to the square of

independent of

Which of the following is a constituent of vinegar ? Around 10% alcohol Around 1% acetic acid Both (a) and (b) Neither (a) nor (b)

Both (a) and (b)

During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as it is very corrosive at elevated temperature. its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced). it decomposes on further increasing the temperature. none of these.

its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced).

Kopper-Totzek coal gasifier can give ammonia: synthesis gas (H2 + N2). is a moving bed reactor. cannot use coking coal. operate at very high pressure.

can give ammonia synthesis gas (H2 + N2).

Addition of calcium oxide to water produces exothermic heat hissing sound slaked lime all (a), (b) & (c)

all (a), (b) & (c)

Sodium bisulphite is used for __________ water. deaeration dechlorination both (a) & (b) neither (a) nor(b)

both (a) & (b)

Riboflavin is a/an vitamin analgesic drug anaesthetics anti-malarial drug

vitamin

Flash point of most vegetable oils is about __________ °C. 50 100 200 300

200

Presence of sodium tripolyphosphate (an additive) in synthetic detergent: facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions). inhibits its corrosive effects. does not allow redeposition of dirt on the cleaned surface. none of these.

facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions).

Dense soda ash used in the manufacture of glass, is chemically represented by Na2CO3 Na2CO3.10H2O Na2CO3.H2O Na2HCO3

Na2CO3.H2O

Reverse osmosis is normally used for the: separation of isotopes of uranium from gaseous uranium hexaflouride. separation of helium from natural gas. desalination of brackish water to produce potable (drinking) water. purification of oxygen.

desalination of brackish water to produce potable (drinking) water.

Hydrazine is largely used as a starting material for 'hypo'. in photographic industry. as rocket fuel. in printing industry.

in printing industry.

'Synthesis gas' meant for the synthesis of organic compound is a variable mixture of N2 & H2 CO2 & H2 CO & H2 C & H2

CO & H2

Litharge is lead oxide zinc oxide zinc sulphide cellulosic photographic material

lead oxide

Coagulant is used __________ filtration. before after during to avoid

before

10% oleum comprises of 10% free SO2 H2SO3 SO3 H2SO4

SO3

Use of chlorine in the treatment of sewage: helps in grease separation. increases the biological oxygen demand(BOD). causes bulking of activated sludge. aids in flocculation.

helps in grease separation.

Removal of dirt/soil by soaps or detergent does not involve the __________ of soil. emulsification dispersion precipitation wetting

precipitation

A unit operation is exemplified by the process of reduction desorption nitration combustion

desorption

The major constituents of glass are lime, clay and soda ash sand, lime and soda ash silica, alumina and clay silica, alumina and soda ash

sand, lime and soda ash

Margarine is a/an fat explosive plasticiser rocket propellant

fat

Oils and fats are converted to soap in a process called hydrogenation esterification saponification none of these

saponification

Glycerine can be obtained from fat naphthalene cumene sucrose

fat

Blue vitriol is chemically copper sulphate ferrous sulphate copper nitrate aluminium sulphate

copper sulphate

Trinitro-toluene (TNT) is used in glycerine manufacture. an explosive. used in dye manufacture. none of these.

an explosive.

Thorium is mainly used for the manufacture of gas mantles. as a fissile fuel in a nuclear reactor. in the manufacture of hydrogen bomb. in the treatment of cancer.

for the manufacture of gas mantles.

During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to: increase the rate of absorption. avoid corrosion. reduce the cooling water circulation rate. none of these.

avoid corrosion.

Good quality of edible salt is obtained from brine by the process of solar evaporation vacuum evaporation freeze drying electrolysis

vacuum evaporation

Electric bulbs are made of __________ glass. jena flint crookes pyrex

flint

Which of the following is used as a binding material in soap to improve soap texture ? Rosin Borax Benzyl acetate Sodium carbonate

Borax

An alkali metal salt of palmitic acid is known as soap metallic soap detergent alkaloid

metallic soap

Washing soda is chemically represented by Na2CO3 Na2CO3.H2O Na2CO3.10H2O NaHCO3

Na2CO3.10H2O

Magnesium and calcium __________ cause temporary hardness of water. carbonates bicarbonates phosphates sulphates

bicarbonates

Which form of sulphur is the most stable at room temperature ? Plastic Monoclinic Rhombic Flowers of sulphur

Rhombic

Vegetable oils and fats basically differ in their density ranges physical state chemical composition chemical properties

physical state

Average sulphur content in Indian pyrites is about __________ percent. 15 35 55 70

Oil is a/an mixture of glycerides. mixture of glycerides of fatty acids. solid at normal temperature. ester of alcohols other than glycerine.

mixture of glycerides of fatty acids.

Which of the following is a constituent of coffee ? Caffeine Nicotine Calgon Lignin

Caffeine

Which of the following is the main constituent of the mother liquor produced in salt industry ? Quick lime Glauber's salt Salt petre Bromine

Bromine

Silicon carbide is a/an adhesive abrasive type of glass brittle material

abrasive

Oxygen is produced by fractionation of air using __________ process. Linde's Claude's either (a) or (b) none of these

either (a) or (b)

Trinitrotoluene (TNT), an explosive, is made by the nitration of nitrobenzene toluene nitrotoluene benzene

toluene

Which of the following is used as a coagulant in treating turbid water ? Chlorine Ferric sulphate Calcium sulphate Activated carbon

Ferric sulphate

Carborundum consists mainly of bauxite silicon carbide boron carbide calcium carbide

silicon carbide

Wax is a: mixture of glycerides. mixture of esters of polyhydric alcohols excepting glycerine. liquid at room temperature. mixture of glycerides of fatty acids.

mixture of esters of polyhydric alcohols excepting glycerine.

Catalyst used in the hydrogenation of oil is nickel platinum iron alumina

nickel

Viscose rayon is cellulose nitrate. regenerated cellulose nitrate. regenerated cellulose acetate. none of these.

none of these.

Triple superphosphate is manufactured by reacting phosphate rock with phosphoric acid. phosphate rock with sulphuric acid. phosphate rock with nitric acid. ammonium phosphate with phosphoric acid.

phosphate rock with phosphoric acid.

Use of hydrated lime in water treatment before filtration, reduces the bacterial load on filters. after filtration, combats the corrosive-ness of water due to the presence of O2 & CO2. is to adjust the pH value. all (a), (b) and (c).

all (a), (b) and (c).

Higher vicosity index of a lubricating oil denotes less changes in fluidity of oil with temperature. substantially high change in fluidity of oil with temperature. its unsuitability under varying temperature conditions . none of these.

less changes in fluidity of oil with temperature.

Le-Blanc process is a primitive process for the manufacture of caustic soda soda ash bromine from sea water hydrochloric acid

soda ash

How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln? 500°C 750°C 1000°C 1500°C

1000°C

Cement setting under water employs a/an __________ process. hydration decomposition oxidation reduction

hydration

__________ are added in lacquers to remove film brittleness and to improve adhereness. Film forming materials Plasticisers Diluents Solvents

Plasticisers

Systemic insecticides are absorbed throughout the plant. kill insects following external bodily contact. are stomach poisons. emit poisonous vapour.

are absorbed throughout the plant.

Dry ice (solidified CO2) is used for the: storage & shipment of frozen foods and ice-creams. liquefaction of permanent gases. liquefaction of natural gas. none of these.

storage & shipment of frozen foods and ice-creams.

In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the diamine and the ring. dibasic acid and the ring. diamine and the dibasic acid. none of these.

diamine and the dibasic acid.

Chemical formula of BHC, which is an insecticide is C6H6Cl6 C6Cl6 C6H5Cl C6H4Cl2

C6H6Cl6

A bio-catalyst produced by living cells which acts independent of the cell is called a/an substrate enzyme nutrient none of these

enzyme

Pick out the wrong statement. DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction. Chloral is obtained by the chlorination of ethyl alcohol. Insecticides acting on the insects through the respiratory system are called fumigants. Benzene hexachloride is not a contact insecticide.

Benzene hexachloride is not a contact insecticide.

The product obtained on mixing calcium oxide with water is called quicklime slaked lime milk of lime none of these

slaked lime

The major constituent of black liquor generated during paper manufacture is sodium sulphate carbonate hydroxide bi-carbonate

carbonate

Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulphonic acid produces sodium dodecylbenzene sulphate, which is a/an explosive soap detergent analgesic drug

detergent

Conversion of SO2 to SO3 in Monsanto 4-pass converter is about __________ percent. 80 90 98 100

Coke oven gas consists mainly of H2, & CH4 CO, & CO2 H2, & CO CH4, & CO

H2, & CH4

Chemical name of 'alum' is barium sulphate. aluminium sulphate. aluminium chloride. calcium sulphate.

aluminium sulphate.

Lithopane is explosive white lead filter aid ZnS (white pigment)

ZnS (white pigment)

What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell ? Cl2 & Na Cl2 & H2 O2 & H2 Cl2, H2 & NaOH solution.

Cl2, H2 & NaOH solution.

__________ acid is the main constituent of cotton seed oil. Acetic Linoleic Palmitic Oleic

Linoleic

Chemical formula of 'salt cake' is Na2SO4 CaSO4 MgSO4 BaSO4

Na2SO4

Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in pyrolysis of oil. sintering of porous catalyst. hydrogen embrittlement. all (a), (b) and (c).

all (a), (b) and (c).

Nicotine is a volatile alkaloid. obtained by treating by-products of the tobacco processing industry. both (a) and (b). neither (a) nor (b).

both (a) and (b).

Separation of fresh water from sea water can be done by the __________ operation. osmosis reverse osmosis absorption adsorption

reverse osmosis

Na2CO3.10H2O is called washing soda soda ash slaked lime quicklime

washing soda

Reaction of an alcohol with organic acid is called the __________ reaction. saponification esterification neutralisation acidification

esterification

Ethanol amine is produced using ammonia and ethyl benzene ethylene oxide ethanol ethane

ethylene oxide

__________ acid is an unsaturated fatty acid. Palmitic Oleic Stearic Oxalic

Oleic

CO & H2 are the constituents of producer gas water gas coke oven gas all (a), (b) and (c)

all (a), (b) and (c)

Economics of 'Solvay Process' depends upon the efficiency of: carbonating tower ammonia recovery ammonia recovery and size of the plant ammoniation of salt solution

ammonia recovery and size of the plant

_________ is a thermosetting plastic. Polyvinyl chloride Polythene Bakelite Teflon

Bakelite

Na2CO3 is called washing soda soda ash plaster of paris calcite

soda ash

Flux addition during smelting of ore is done to: remove impurities/gangue. enhance rate of reaction. accelerate reduction of ore. separate slag from metal.

remove impurities/gangue.

Hydrazine is used in water treatment for the removal of: colloidal impurities dissolved oxygen turbidity chlorinous taste

dissolved oxygen

Direct conversion of chemical energy into electrical energy is done in a magnetohydrodynamic (MHD) generator. fuel cell. fast breeder reactor. none of these.

fuel cell.

Which of the following is not produced commercially from sea water ? Magnesium & potassium compounds Common salt Bromine Iodine

Iodine

Pick out the wrong statement. Dry process is used for the manufacture of cement, when the raw material is blast furnace slag. Portland cement is made employing wet process. Gypsum is added to portland cement to lengthen its setting time. none of these.

none of these.

Nylon-6 as compared to Nylon-66 is having higher hardness abrasion/resistance melting point none of these

none of these

Digestion of wood-base materials (for manufacture of pulp) is done to remove lignin. produce long fibres. prevent deterioration on storage. none of these.

remove lignin.

Soap cannot be used with hard water, because hard water contains sulphate. they form insoluble calcium soaps which precipitate. they attract back the removed dirt. none of these.

they form insoluble calcium soaps which precipitate.

Which of the following is not an antibiotic ? Penicillin Streptomycin Tetracyclin Quinine

Quinine

The most reactive allotropic form of phosphorus is __________ phosphorus. red yellow violet black

yellow

Plasticisers are added to synthetic plastics to impart flexibility. improve workability during fabrication. develop new improved properties not present in the original resins. all (a), (b) and (c).

all (a), (b) and (c).

Rosin soap is added during paper manufacture to impart adhesive properties. improve opacity. impart resistance to penetration by liquids. none of these.

impart resistance to penetration by liquids.

Hydrogen gas is not produced commercially (for nitrogeneous fertiliser manufacture) by iron-steam reaction. electrolysis of water. steam reforming of naphtha. its cryogenic separation from coke oven gas.

iron-steam reaction.

Carboxymethyl cellulose (CMC) is added in detergents to prevent redeposition of soil on cleaned surface. act as optical brightening agent. inhibit corrosion in washing machines made of aluminium, none of these.

prevent redeposition of soil on cleaned surface.

Synthesis gas is a mixture of CO and H2 N2 and H2 H2, CH4 and CO CO2 and H2

CO and H2

Which of the following impurities in feed water for high pressure boiler is the most detrimental ? Silica Dissolved oxygen Suspended salt Dissolved salt

Silica

Which glass is usually used in optical work? Lead glass High silica (borosilicate) glass Photo-sensitive glass Fibre glass

Lead glass

Fourdrinier machine is used in the manufacture of sugar paper alcohol from molasses phenol formaldehyde

paper

The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent. cationic anionic amphoteric semi polar

anionic

Reaction of calcium carbide with water produces a gas, which is used as an illuminant. for metal cutting/welding. both (a) & (b). neither (a) nor (b).

both (a) & (b).

Salt is the basic raw material for the manufacture of cement glass potteries caustic soda

caustic soda

Pick out the wrong statement. Low intensity explosives are also called propellants, whereas high intensity explosive are called detonators. Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur. Lead azide is a popular military explosive. TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being.

TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being.

Hydrazine (N2H4) is used mainly as a/an explosive rocket fuel detergents additive none of these

rocket fuel

Hydrocynic acid (HCN) is used as an insecticide for controlling timber degradation by ants controlling poultry lice potato beetle citrus fruits

citrus fruits

Molecular weight of plastics ranges from 5000 to 10000 20000 to 250000 500 to 5000 106 to l09

20000 to 250000

Acrylonitrile is mainly used in the __________ industry. polymer printing dyeing photographic

dyeing

The enzyme which converts starch into the disacharides maltose is diastase maltase yeast none of these

diastase

Pick out the false statement pertaining to water treatment. Aeration of water is effective in CO2 removal. The zeolite water softening process reduces the hardness of water by not more than 50%. Sodium sulphate or sodium carbonate do not cause hardness in water. Water with pH value less than 7, is acidic.

The zeolite water softening process reduces the hardness of water by not more than 50%.

Presence of H2S in raw water (to be chlorinated) results in the reduced softening capacity of zeolite. increased dosage of chlorine to provide a disinfecting residual in the water. easy removal of its hardness. none of these.

increased dosage of chlorine to provide a disinfecting residual in the water.

Contact process of sulphuric acid manufacture yields acid of higher concentration than chamber process. yields acids of lower concentration than chamber process. is obsolete. eliminates absorber.

yields acid of higher concentration than chamber process.

Fat dispersed in water is exemplified by colloids gel butter emulsion

butter

Maleic anhydride is produced by catalytic oxidation of toluene ethyl alcohol naphthalene benzene

benzene

Catalyst used in the oxidation of benzene to produce maleic anhydride is V2O5 Pt Ni Cr

V2O5

Widely used method for the conditioning of boiler feed water is the cold lime process coagulation hot-lime soda process sequestration

hot-lime soda process

Blue colour is imparted to glass by the addition of FeSO4 PbO CaO NaOH

CaO

In the manufacture of viscose rayon, the raw material used industrially is recalyptious wood bamboo bagasse fine teak wood

fine teak wood

Bordeaux mixture is a/an fertiliser inorganic fungicide insecticide explosive

inorganic fungicide

Silicone is a/an thermoplastic inorganic polymer monomer none of these

inorganic polymer

Nickel is not used as a catalyst in the __________ reaction. shift conversion oil hydrogenation steaming reforming of naphtha ammonia cracking/dissociation

shift conversion

Roasting of metallurgical ores is done mainly to dehydrate it. sinter the ore. remove CO2 & H2O. remove arsenic & sulphur.

remove arsenic & sulphur.

Molasses is the starting material for the production of alcohol essential oil fatty acids massecuite

alcohol

BHC (Benzene hexachloride) is made by the chlorination of benzene which is an addition reaction. which is a substitution reaction. in absolute dark. in presence of sunlight.

which is an addition reaction.

Diaphragm electrolytic cell as compared to mercury electrolytic cell produces 70% NaOH solution. requires less specific power consumption for the production of chlorine. requires lesser investment for similar capacity. all (a), (b) and (c).

requires lesser investment for similar capacity.

Calcareous & argillaceous materials are used in the manufacture of lead cement carbon disulphide none of these

cement

Pick out the wrong statement. Azoic dyes are mostly applied on cotton fabrics. Basic dyes (e.g. amino derivatives) are applied mostly to paper. Mordant dyes are applied mainly to wools. none of these.

none of these.

Commercial production of calcium carbide requires limestone and __________ as raw materials. coke sand soda ash fuel oil

coke

Which one of the following is not likely to be a constituent of vegetable oils ? Citric acid Oleic acid Stearic acid Glycerol

Citric acid

Nitroglycerene absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as a controlled explosive called dynamite. The raw material used for its manufacture are glycerene, nitric acid and _____. sulphuric acid phosphoric acid hydrochloric acid hydroflouric acid

sulphuric acid

The process involved in converting rubber into a thin sheet or coating it on fabric is called extrusion mastication calendering valcanisation

calendering

Air used in aerobic fermentation must be sterilized, otherwise the recovery of product will be difficult. contamination of pure culture would result. uniformity of product cannot be achieved. none of these.

contamination of pure culture would result.

Alkylbenzene sulfonate (ABS) is a detergent rubber pesticide polyester

detergent

High temperature carbonisation of coal produces inferior coke compared to low temperature carbonisation. less of gases compared to liquid products. larger quantity of tar compared to low temperature carbonisation. none of these.

none of these.

Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent. 7-14 and 14-30 7-14 and 40-50 14 - 30 and 40-50 10 - 20 and 40 - 50

7-14 and 14-30

Setting of plaster of paris is accompanied with hydration dehydration hydrolysis loss of CO2

hydration

Process conditions in fermentator used for production of penicillin is 25°C, 2 atm. 50°C, l0 atm. 30°C, 200 mm Hg (absolute). 90°C, 45 atm.

25°C, 2 atm.

Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of carbon arsenic lead sulphur

arsenic

Sodium chloride content in sea water is about __________ gms/litre. 2 10 25 50

Fluorescent dyes are added in detergents to act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics. attain distinctiveness from other brands. act as tarnish inhibitor for metals like German silver. none of these

act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics.

High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to flocculate the impurities. facilitate fast filtration. both (a) and (b). neither (a) nor (b).

both (a) and (b).

Polyvinyl chloride (PVC) is a thermosetting material. a condensation polymerisation product. made by employing emulsion polymerisation. none of these.

made by employing emulsion polymerisation.

Bleaching of paper pulp is done with activated clay bromine chlorine or chlorine dioxide magnesium sulphite

chlorine or chlorine dioxide

Pick out the wrong statement. Kraft method of pulp manufacture can process all types of fibrous raw materials. Digestion time for bagasse is less than that for wood base materials. Both temperature and pressure in the digestor is less in case of the sulphite method as compared to that in the sulphate method. none of these.

none of these.

Isopropyl benzene produced by alkylation of benzene with propylene is known as neoprene cumene gelatin mercaptans

cumene

Consider the production of ammonia from methene and air as raw materials. The catalyst used are: (i) __________ for steam reforming of methane and (ii) __________ for ammonia synthesis. i - Ni/Al2O3; ii - Cu - ZnO/Al2O3 i - Fe/Al2O3; ii - Cu - ZnO/Al2O3 i - Ni/Al2O3; ii - Fe/Al2O3 i - Fe/Al2O3; ii - Ni/Al2O3

i - Ni/Al2O3; ii - Fe/Al2O3

For the hydrogenation of oils __________ (A) __________ is commonly used as catalyst and __________ (B) __________ is a catalyst poison. (A) platinum (B) sulphur (A) palladium (B) oxygen (A) nickel (B) sulphur (A) nickel (B) oxygen

(A) nickel (B) sulphur

Main constituents of natural rubber is polystyrene polyisoprene polybutadiene polychloroprene

polyisoprene

Highly porous refractory bricks are less susceptible to chemical attack by molten fluxes and gases etc. very strong. having very high thermal conductivity. none of these.

none of these.

Fumigant insecticides kill insects, when they eat it. emit poisonous vapour. are absorbed throughout the plant. none of these.

emit poisonous vapour.

Fermentator temperature during production of alcohol from molasses is around __________ °C. 5 30 150 300

Which of the following coals has the highest calorific value ? Lignite Sub-bituminous Anthracite Peat

Anthracite

Which of the following is not an abrasive material ? Bakelite Pumice Corundum Carborundum

Bakelite

Pick out the wrong statement. Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate. Glass is decolorised during its manufac-ture by adding antimony oxide, mangnese dioxide or arsenic oxide. Ordinary glass is represented chemically by Na2O . CaO . 6SiO2. Red color is imparted to glass by addition of arsenic oxide.

Red color is imparted to glass by addition of arsenic oxide.

Finely ground calcium aluminate & silicate is a/an cermet cement abrasive explosive

cement

Cooking liquor in case of sulphite process is sodium sulphite and sodium bisulphite. magnesium sulphite and free SO2 in acid medium. magnesium sulphate and magnessium bicarbonate. none of these.

sodium sulphite and sodium bisulphite.

90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C. <0 10-30 250-280 500-600

10-30

Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as __________ oil. drying semi-drying non-drying none of these

non-drying

Fats as compared to oils have more unsaturated glycerides of fatty acids. less unsaturated glycerides of fatty acids. much higher reactivity to oxygen. lower melting point.

less unsaturated glycerides of fatty acids.

Thermal pyrolysis of ethylene dichloride produces trichloroethylene vinyl chloride ethanol amine ethylene oxide

vinyl chloride

The main component of pyrex glass is zinc lead boron celenium

lead

Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove colour turbidity bacteria all (a), (b) and (c)

all (a), (b) and (c)

__________ is an ore concentrating metallurgical process involving a chemical change. Electromagnetic separation Froth floatation Roasting none of these

Roasting

Basic oxide is absent in __________ glass. flint pyrex quartz all (a), (b) & (c)

quartz

Nylon-6 is a polyamide thermosetting resin polyester none of these

polyamide

Enzymes are proteins with high molecular weight (around 10, 000). derived from living organisms. catalyst for temperature sensitive reactions. all (a), (b) and (c).

all (a), (b) and (c).

Multistage catalytic converter is not used in the conversion of SO2 to SO3 NH3 synthesis reaction. both (a) & (b). neither (a) nor (b).

NH3 synthesis reaction.

The main product of high temperature carbonisation of coal is coke ammonia tar phenol

coke

_________ is a thermosetting plastic. Polythene Epoxy polymer P.V.C. Polystyrene

Epoxy polymer

In an integrated steel plant, NH3 present in coke oven gas is normally recovered as (NH4)2SO4 NH4Cl (NH4)2 NO3 liquid NH3

(NH4)2SO4

Flexible foam (for mattresses) is usually made of PVC silicone polyurethanes polyamides

polyurethanes

Glycerine is a by-product of the __________ industry. soap detergent oil hydrogenation paint

soap

One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to adjust the pH of the syrup. remove the coloring matter from the syrup. reduce the viscosity of the syrup. improve the rate of crystallisation of sugar.

adjust the pH of the syrup.

Permanent hardness of water can be removed by addition of soda ash to it. treating it with zeolites. passing it through sodium hexametaphosphate. all (a), (b), and (c).

all (a), (b), and (c).

Chalcopyrite is the main ore of copper lead tin iron

copper

The end bleaching agent used to move last traces of colour bodies from the pulp is chlorine dioxide (ClO2) MgO SO2 gas mercaptans

chlorine dioxide (ClO2)

Bio-degradable detergents ______. can be readily oxidised. pose problem in sewerage plant. have an isoparaffinic structure. should not be used as it spoils the cloth.

can be readily oxidised.

Sea water contains about __________ ppm of bromine. 5 70 500 1700

Which allotrope of sulphur is insoluble in carbon disulphide ? Rhombic sulphur Monoclinic sulphur Plastic sulphur Milk of sulphur

Plastic sulphur

Lubricating greases are a mixture of mineral oil, soap and additives. mineral oil and metallic soap. mineral oil and fatty oil. fatty oil and metallic soap.

mineral oil, soap and additives.

Metallic soap is __________ salt of fatty acids. sodium potassium both sodium & potassium aluminium or calcium

aluminium or calcium

Cation exchanger is regenerated usually with NaOH H2SO4 hydrazine alum solution

H2SO4

In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because ____. SO3 gas is sparingly soluble in water. water forms an acid mist, which is difficult to absorb. the purity of acid is affected. scale formation in the absorber is to be avoided.

water forms an acid mist, which is difficult to absorb.

Bitterns is a/an ______. unsaturated fat. starting material for the production of iodine. by-product of chlor-alkali industry. none of these.

none of these. Bitterns are concentrated brine that remains after the crystallization of salt from seawater.

The most widely used coagulant for removing suspended impurities from water is bleaching powder chlorine calcium sulphate alum

alum

Main constituent of limestone is CaCO3 MgCO3 Na2CO3 CaSO4

CaCO3

__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine. Chlorine Ammonium chloride Sodium carbonate Sodium bi-carbonate

Chlorine

Fat splitting catalyst is CaCO3 ZnO Al2O3 Fe

ZnO

Phthalic anhydride is used in making PVC as plasticisers in insecticides manufacture for making nylon-6

as plasticisers

Penicillin is separated from fermented broth by extraction with amyl or butyl acetate. ternery azeotropic distillation. evaporation in calendria. extractive distillation.

extraction with amyl or butyl acetate.

__________ process is used for producing soda ash. Chamber Chance Tromp Solvay

Solvay

Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on slaked lime soda lime calcium perchlorate none of these

slaked lime

Which of the following is an unsaturated fatty acid ? Lauric acid Palmitic acid Stearic acid Oleic acid

Oleic acid

The yield of tar from high temperature carbonisation of dry coal is about __________ percent. 3 12 22 0.3

__________ is used as a flux in the smelting of copper ore like chalcopyrite. Coke breeze Lime powder Silica/quartz Dolomite

Silica/quartz

Phenol formaldehyde is produced by condensation polymerisation. It is also known as ______. teflon bakelite polyester nylon-66

bakelite

Hydrogenation of oil does not remove double bonds. raise its melting point. improve its resistance to oxidation. none of these.

none of these.

Main constituents of cotton fiber is lignin cellulose starch gelatine

cellulose

CaCl(OCl) is the chemical formula of hypo bleaching powder plaster of paris aqua regia

bleaching powder

Which is the most suitable dye for synthetic fibres ? Acid dye Azoic dye Pigment dye Mordant dye

Acid dye

Pick out the wrong statement. Cold rubber (SBR) is superior as compared to hot rubber (SBR). Polymerisation temperature can modify the properties of SBR. Production of cold SBR employs lower pressure as compared to that of hot SBR. none of these.

none of these.

Pick out the wrong statement. Strongly caking coal should not be used in the Lurgi gasifier. Acetylene gas can not be used for illumination purpose. Water gas is called blue gas because of the color of the flame, when it is burnt. Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels.

Acetylene gas can not be used for illumination purpose.

Hydrolysis of sugar is called hydration inversion esterification none of these

inversion

Sulphuric acid completely saturated with sulphur trioxide is called concentrated sulphuric acid. oleum. sulphurous acid. dilute sulphuric acid.

concentrated sulphuric acid.

Fish contains about __________ percent oil. 5 10 20 35

The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to avoid mechanical weakening of fibre. remove lignin by way of crystallisation. increase the cellulose content. none of these.

avoid mechanical weakening of fibre.

Polymethyl methacrylate (PMMA) is known as bakelite teflon perspex nylon-6

perspex

Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass. chromium arsenic copper mangnese

copper

Percentage of alcohol in beer may be around __________ percent. 2-8 18-23 27-32 1-4

2-8

Which of the following is an ore of iron ? Galena Chalcopyrite Hematite Bauxite

Hematite

Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process ? NH3 NaCl CaO Coke

NH3

High purity nitrogen is used in making protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils. fire fighting purposes. both (a) & (b). neither (a) nor (b).

both (a) & (b).

Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials. coke and sand brine and coal coke and caustic soda none of these

brine and coal

Naphthalene is removed from coke oven gas by adsorbing on palladium. absorbing in ethanolamine. scrubbing with wash oil. passing it through electrostatic precipitator.

scrubbing with wash oil.

The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm2/gm. 800 1600 4000 8500

1600

Which of the following is not present in bagasse fibre ? Cellulose Lignin Pentogens None of these

None of these

Nitric acid is not used in the manufacture of detergents fertilisers aqua regia explosives.

detergents

Naphthols are derivates of methyl amine naphthalene phenol xylene

naphthalene

Fermentation is adversely affected by the presence of air. absence of air. high concentration. presence of ammonium salts.

high concentration. High concentration cause osmotic stress + inhibits enzyme action.

Extraction of __________ employs an electrolytic process. aluminium silver copper all (a), (b) and (c)

Aluminium Aluminum can only be extracted through hall-heroult process (electrolytic) while others offer a variety of methods.

Dechlorination of treated water is necessary to remove residual turbidity. reduce the bacterial load on filter. control taste and odour. remove chlorinous taste.

remove chlorinous taste.

Fire clay is __________ refractory material. a basic an acidic a neutral not a

an acidic Fire Clay is composed of SiO2 and Al2O3 which are acidic oxides.

An oil is converted into fat by its hydrogenation hydrolysis hydrocracking hydration

hydrogenation

Production of one ton of cement requires about __________ tons of limestone. 0.6 1.2 2.2 3.8

1.2

Low temperature carbonisation of coal takes place at __________ °C. 300 1100 700 900

700

Shaving soaps are soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property. metalic soaps compounded with frothing agents. high free alkali soaps having excess of cane sugar and alcohol. none of these

soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property.

Chemical Process Flashcards

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