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May 2023 ChELE > CPI,1,2 > Flashcards

CPI,1,2 Flashcards

1
Q

Oxidation of SO2 to SO3 is favoured by

A

low temperature and high pressure.

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2
Q

Gun powder, which is an explosive comprises of charcoal, sulphur and

A

salt petre

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3
Q

Starting raw material for the manufacture of alum is

A

bauxite

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4
Q

Salt cake is chemically represented by

A

Na2SO4

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5
Q

Which of the following sugars is the sweetest?

A

Fructose

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6
Q

Paper pulp produced by kraft/sulphate process is

A

strong fibrous

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7
Q

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.

A

diabatic expansion against a piston or in a turbine.

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8
Q

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.

A

drilling of petroleum wells and pickling of steel sheets.

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9
Q

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

exothermic
endothermic
catalytic
autocatalytic

A

endothermic

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10
Q

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

A

regenerated cellulose acetate

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11
Q

All enzymes are made of
fats
carbohydrates
proteins
amino acids

A

proteins

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12
Q

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

A

exothermic

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13
Q

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

A

dehydrogenation

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14
Q

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

A

callagen

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15
Q

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.

A

none of these.

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16
Q

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

A

15 - 20

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17
Q

Fusel oil is a/an

A

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

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18
Q

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).

A

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

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19
Q

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

A

ZnO

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20
Q

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

A

oleum

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21
Q

Haemoglobin is a/an
amino acid
biological catalyst
protein
enezyme

A

protein

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22
Q

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

A

is a good adhesive.

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23
Q

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

A

50

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24
Q

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.

A

Pollution of water stream by mercury.

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25
Q

Esterification reaction produces
detergent
vanaspati
soap
mercaptans

A

soap

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26
Q

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

A

adsorbs

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27
Q

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

A

CO, CO2 N2, H2

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28
Q

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

A

polychloroprene

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29
Q

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).

A

is not unfit for drinking purpose.

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30
Q

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

A

Tetra-ethyl lead

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31
Q

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

A

cure pimples & dandruff.

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32
Q

Phosphate rock is a raw material for the manufacture of

phosphoric acid
phosphorous
superphosphates
all (a), (b) and (c)

A

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

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33
Q

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).

A

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

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34
Q

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

A

Iron oxide

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35
Q

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

A

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

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36
Q

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

A

10 atm., 170-180°C

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37
Q

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.

A

sodium chloride

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38
Q

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.

A

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

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39
Q

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

A

limestone

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40
Q

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

A

Solvay

41
Q

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

A

nylon-6

42
Q

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

A

mining sulphur

43
Q

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

A

coagulation

44
Q

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).

A

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

45
Q

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

A

CO

46
Q

The drug used in contraceptives is
sulphadizene
mestranol
methyl salicylate
pencillin

A

mestranol

47
Q

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

A

white

48
Q

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.

A

large quantity of coal can be processed.

49
Q

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

A

used in color discharge tube.

50
Q

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

A

sodium hexametaphosphate

51
Q

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

A

Drying oil

52
Q

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

A

a synthetic polymer.

53
Q

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

A

5 atm & 275°C

54
Q

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

A

none of these.

55
Q

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

A

phenol and acetone

56
Q

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

A

flint

57
Q

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

A

vanadium

58
Q

Most commonly used rubber vulcanising agent is
sulphur
bromine
platinum
alumina

A

sulphur

59
Q

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

A

both (a) & (b)

60
Q

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

A

less than

61
Q

Dehydrogenation of isopropanol produces
propyl alcohol
acetone
trichloroethylene
formaldehyde

A

acetone

62
Q

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.

A

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

63
Q

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

A

vacuum crystallisation

64
Q

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

A

natural gas

65
Q

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

A

20 - 30

66
Q

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

A

20% oleum.

67
Q

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

A

alum

68
Q

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

A

ZnO

69
Q

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

A

Sodium sulphate.

70
Q

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

A

gypsum

71
Q

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.

A

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

72
Q

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

A

Baking powder

73
Q

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

A

material with sharp definite melting point.

74
Q

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

A

soda ash

75
Q

.
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).

A

SASOL (in South Africa).

76
Q

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

A

moving

77
Q

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.

A

cause cholesterol build up and blood clotting.

78
Q

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

A

5

79
Q

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

A

anti soil redeposition agent

80
Q

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

A

converts its plasticity into elasticity.

81
Q

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.

A

alt, limestone and coke or gas.

82
Q

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

A

DDT

83
Q

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

A

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

84
Q

Sudden temperature fluctuation does not affect pyrex glass, because of its
low co-efficient of expansion.
high co-efficient of expansion.
high melting point.
both (b) and (c).

A

low co-efficient of expansion.

85
Q

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

A

none of these

86
Q

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

A

< 10

87
Q

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

A

exothermic

88
Q

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

A

Ostwald’s

89
Q

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

A

car battery solution

90
Q

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

A

alumina

91
Q

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

A

none of these

92
Q

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

A

brine

93
Q

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

A

nickel

94
Q

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

A

Alkyl benzene sulphonate

95
Q

6.
Drinking (potable) water treatment does not involve
coagulation
sedimentation
softening
disinfection

A

softening

96
Q

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

A

laminates

97
Q

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.

A

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

98
Q

DT 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.

A

avoid its decomposition.

99
Q

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.

A

oxides of nitrogen & V2O5 on a porous carrier.

May 2023 ChELE (11 decks)

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