Chemical Process Flashcards
(662 cards)
1
Q
Oxidation of SO2 to SO3 is favoured by
A
low temperature and high pressure.
2
Q
Gun powder, which is an explosive comprises of charcoal, sulphur and
A
salt petre
3
Q
Starting raw material for the manufacture of alum is
A
bauxite
4
Q
Salt cake is chemically represented by
A
Na2SO4
5
Q
Which of the following sugars is the sweetest?
A
Fructose
6
Q
Paper pulp produced by kraft/sulphate process is
A
strong fibrous
7
Q
Claude process of gas liquefaction employs
A
adiabatic expansion against a piston or in a turbine.
8
Q
The main use of HCl is in the
A
drilling of petroleum wells and pickling of steel sheets.
9
Q
The gasification reaction represented by, C + H2O = CO + H2, is a/an __________ reaction.
A
endothermic
10
Q
Viscose rayon is chemically
A
regenerated cellulose acetate
11
Q
All enzymes are made of
A
proteins
12
Q
The combustion reaction, C + O2 = CO2, is
A
exothermic
13
Q
Styrene is produced from ethyl benzene by the process of
A
dehydrogenation
14
Q
Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of
A
callagen
15
Q
The chamber process is
A
none of these.
16
Q
Sucrose content in the raw juice extracted from sugar cane is about __________ percent.
A
15 - 20
17
Q
Fusel oil is a/an
A
mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses).
18
Q
Styrene-butadiene-rubber (SBR) as compared to natural rubber has
A
all (a), (b) and (c).
19
Q
Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.
A
ZnO
20
Q
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
A
oleum
21
Q
Haemoglobin is a/an
A
protein
22
Q
Epoxy resin
A
is a good adhesive.
23
Q
Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.
A
50
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?
A
Pollution of water stream by mercury.
25
Esterification reaction produces
soap
26
Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials.
adsorbs
27
Producer gas consists mainly of
CO, CO2 N2, H2
28
Neoprene is the trade name of
polychloroprene
29
Hard water
is not unfit for drinking purpose.
30
Which of the following is an organo-metal-lic compound ?
Tetra-ethyl lead
31
Sulphur addition in soap is done to
cure pimples & dandruff.
32
Phosphate rock is a raw material for the manufacture of
all (a), (b) and (c)
33
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
all (a), (b) and (c).
34
Which of the following is not a raw material used for the manufacture of ordinary glass?
Iron oxide
35
Esterification reaction
all (a), (b) and (c).
36
In sulphate pulp manufacture, the pressure and temperature in the digestor is
10 atm., 170-180°C
37
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
sodium chloride
38
Pick out the endothermic reaction out of the following.
CaCO3 = CaO + CO2
39
Pasteurisation of milk means
killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.
40
Fusion of bauxite and __________ produces high alumina cement.
limestone
41
__________ process is used for the manufacture of sodium carbonate by ammonia soda process.
Solvay
42
Polycaprolactum is commercially known as
nylon-6
43
Frasch process is for
mining sulphur
44
Very fine suspended and colloidal impurities are removed from water by a process called
coagulation
45
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because
it reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop.
46
Which is the main reducing agent during production of iron from iron ore in a blast furnace ?
CO
47
The drug used in contraceptives is
mestranol
48
Raw materials used for producing __________ cement does not contain iron oxide.
white
49
In the Lurgi coal gasifier
large quantity of coal can be processed.
50
Neon gas is
used in color discharge tube.
51
Calgon used in water treatment is chemically
sodium hexametaphosphate
52
Which oil is preferred for paint manufacture ?
Drying oil
53
Styrene butadiene rubber (SBR) is
a synthetic polymer.
54
Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at
5 atm & 275°C
55
Glycerine is not used in the
none of these.
56
Cumene is the starting material for the production of
phenol and acetone
57
The type of high refractive index glass used in optical instruments is __________ glass.
flint
58
Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale.
vanadium
59
Most commonly used rubber vulcanising agent is
sulphur
60
Terylene is
both (a) & (b)
61
Free alkali in a toilet soap is __________ that in a laundary shop.
less than
62
Dehydrogenation of isopropanol produces
acetone
63
Pick out the wrong statement.
Tarnish inhibitor (e.g., benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc.
64
Concentration of hydrogen peroxide is done by
vacuum crystallisation
65
Helium is produced on commercial scale from
natural gas
66
Fermentation of molasses to produce ethyl alcohol is done at __________ °C
20 - 30
67
The catalyst used in the manufacture of DDT is
20% oleum.
68
Most widely and commonly used coagulant for the removal of suspended impurities in water is
alum
69
__________ is used as a catalyst in fat splitting.
ZnO
70
Which of the following is not produced on commercial scale from sea water?
Sodium sulphate.
71
Heating of __________ to 120°C, produces plaster of paris.
gypsum
72
Pick out the wrong statement.
Decomposition of sulphuric acid on heating does not start before its boiling.
73
Which of the following has sodium bicarbonate as its main constituent ?
Baking powder
74
Ordinary glass is not a/an
material with sharp definite melting point.
75
In premitive days, __________ was being manufactured by Leblanc Process.
soda ash
76
The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
SASOL (in South Africa).
77
Lurgi coal gasifier is a pressurised __________ bed reactor.
moving
78
Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils
cause cholesterol build up and blood clotting.
79
Paper grade bamboo contains about __________ percent cellulose.
5
80
Carboxymethyl cellulose (CMC) is added in detergents to act as a/an
anti soil redeposition agent
81
Vulcanisation of rubber
converts its plasticity into elasticity.
82
Raw materials for 'Solvay Process' for manufacture of the soda ash are
salt, limestone and coke or gas.
83
Chloral is used in the manufacture of
DDT
84
Bromine is used in the preparation of
all (a), (b) and (c).
85
Sudden temperature fluctuation does not affect pyrex glass, because of its
low co-efficient of expansion.
86
The process used for the manufacture of ethyl alcohol from molasses is
none of these
87
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.
< 10
88
Absorption of SO3 in 97% H2SO4 is
exothermic
89
__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.
Ostwald's
90
Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the
car battery solution
91
The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is
alumina
92
A good quality coal should have
none of these
93
Zeolite used in water softening process (cation exchange) is regenerated by washing with
brine
94
The catalyst used in shift converter is
nickel
95
Which of the following is a detergent ?
Alkyl benzene sulphonate
96
Drinking (potable) water treatment does not involve
softening
97
Phenol formaldehyde resin is used as an adhesive in making
laminates
98
Pick out the correct statement.
All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms.
99
DDT should not be allowed to come in contact with iron (during its manufacture) to
avoid its decomposition.
100
Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively
oxides of nitrogen & V2O5 on a porous carrier.
101
DDT stands for
dichloro-diphenyl-trichloroethane.
102
Phosphoric acid is prepared from
rock phosphate
103
Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used
as a lubricant.
104
Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda ?
Lime-soda process
105
Bleaching action of bleaching powder is due to its __________ properties.
oxidising
106
Solvent extracted oil
none of these.
107
Which of the following is not required in the manufacture of soda ash by Solvay process ?
Nitric acid
108
Saponification number of an oil or fat
all (a), (b) & (c).
109
The purpose of tanning in leather industry is to
stiffen the leather.
110
Lime and soda ash are added to water to remove
bicarbonates & sulphates of calcium and magnesium.
111
Kaoline is a/an
refractory material
112
Hydrogenation of edible vegetable oils
all (a), (b) and (c).
113
Phenol is mainly used
to produce phenol formaldehyde.
114
Main constituent of dolomite is
MgCO3
115
Conversion of CO to CO2 by steam in presence of a catalyst is called
shift conversion.
116
Refractory bricks having high thermal conductivity is desirable, when it is to be used in the
recuperator
117
Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.
Cl2
118
Plasticisers are added to paints to
give elasticity & prevent cracking of the film.
119
Resistance to fusion of the refractory under a steady rising temperature condition is called
refractoriness
120
Portland cement consists mainly of
CaO & SiO2
121
__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.
Pyrex
122
The amount of benzene present in pure benzol is about __________ percent.
70
123
Cumene (isopropyl benzene) is made by
propylene alkylation of benzene.
124
Which of the following is not a pyrite ore?
Siderite
125
Mannheim furnace is used in the manufacture of
hydrochloric acid.
126
Thermosetting materials
are cross-linked molecules.
127
Pick out the wrong statement. Iodine value of an oil or fat is
independent of the type of oil, whether it is drying or non-drying.
128
Nickel is not used as a catalyst in the
Ostwald's process of HNO3 manufacture.
129
__________ iron is the purest form of iron.
Wrought
130
Enamels
give good glossy finish.
131
Black liquor is converted into white liquor by
evaporation and burning the concentrate followed by causticisation of products.
132
Varnish does not contain
pigment
133
Alcohol is produced by the
hydrolysis of an ether
134
Varnish does not contain
pigment
135
Polymerisation product of C2F4 (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called
teflon
136
Solvent used for extraction of oil is
hexane
137
Insulin is an __________ drug.
none of these
138
Liquor poisoning generally occurs due to the presence of __________ in it.
methyl alcohol
139
Neoprene is chemically known as
polychloroprene
140
Pick out the wrong statement.
Contact process of sulphuric acid manufacture uses nickel as the catalyst.
141
Pick out the wrong statement.
Raw materials for DDT manufacture are benzene and chlorine.
142
Molecular weights of polymers are in the range of
102 - 107
143
Sulphur removal by heating of pyrite ore in presence of air is called its
roasting
144
Deacon's method is used for the manufacture of
chlorine
145
Pick out the true statement pertaining to water treatment.
Normally, the turbidity is removed by adding a coagulent prior to sedimentation.
146
Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass.
borosilicate
147
Prussian blue is chemically represented by
Fe4 [Fe (CN6)3]
148
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
149
The most stable allotropic form of phosphorous is the __________ phosphorous.
black
150
Function of thinner in a paint is to
suspend pigments & dissolve film forming materials.
151
Starting material for the production of styrene butadiene rubber (SBR) is
both (a) & (b)
152
Which one of the following is not an elastomer ?
None of these
153
Which of the following processes can remove both temporary as well as permanent hardness of water ?
Distillation
154
Dacron is a
none of these.
155
Rancidity of the fatty oil can be reduced by its
hydrogenation
156
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like
all (a), (b) and (c)
157
__________ of rubber decreases after its vulcanisation.
Tackiness
158
Boiling of water containing temporary hardness produces
CO2
159
Starting material for the commercial production of ethyl alcohol in India is
molasses
160
Phenol formaldehyde
employs condensation polymerisation.
161
Which of the following is not an insecticide?
Hexane
162
Shrinkage volume in cement setting does not depend upon the
sand to cement ratio.
163
Bisphenol A is produced by the condensation of acetone with
phenol
164
In Kraft process of paper manufacture, white cooking liquor consists of caustic soda
sodium sulphide & sodium carbonate.
165
Presence of carbonaceous matter in the sewage
all (a), (b) and (c).
166
A mineral is termed as 'ore', if
a metal can be economically extracted from it.
167
In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst
all (a), (b) and (c).
168
At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system )
sqrt P
169
Oleum produces fumes of
SO3
170
20% oleum means that in 100 kg oleum, there are 20 kg of
SO3 and 80kg of H2SO4.
171
Chloramines are used in water treatment for
disinfection and control of taste & odour.
172
Glycerine is recovered from lye by
evaporation followed by vacuum distillation.
173
Inversion of sucrose produces
glucose
174
Enzymes are organic catalysts used in the __________ reactions.
biochemical
175
Linde process of gas liquefaction employs
adiabatic expansion through a throttle valve (Joule-Thomson expansion).
176
Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.
50
177
Ore concentration by froth floatation utilises the __________ of ore particles.
wetting characteristics
178
The main use of activated carbon in water treatment is to control
taste and odour
179
The most commonly used substance to speed up the sedimentation of sewage is
lime
180
Sucrose is a
disacchride
181
Sugar content in sugarcane on cane basis is about __________ percent by weight.
5 to 10
182
Pick out the wrong statement.
Total sugar content in molasses is about 10%.
183
The major use of butadiene is
in the manufacture of synthetic rubber.
184
The manufacture of Kraft pulp is done by a/an __________ process.
alkaline
185
Antibiotic
inhibits/destroys the growth of microorganisms.
186
Which of the following paper does not require a filler during manufacture ?
Blotting paper
187
Industrial production of chloroform requires acetone and
calcium hypochlorite
188
Pencillin, an antibiotic drug was discovered by
Alexender
189
Styrene (a monomer for the production of polystyrene) is commercially produced by
catalytic dehydrogenation of ethyl benzene.
190
Hydrogenation of oil takes place in a/an __________ reactor.
trickle bed
191
Fatty material used in soap making is
tallow
192
__________ glass is used for the manufacture of optical glass.
Flint
193
Thermosetting plastic materials
can not be melted after forming.
194
Favourable conditions for the liquefaction of gases in general are
high pressure & low temperature.
195
In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed :
furnace → converter → absorber
196
__________ nature of hypo (sodium thiosulphate) makes it useful in photography.
Complex forming
197
__________ is an ore of lead.
Galena
198
Which of the following is an yellow pigment ?
Lead chromates
199
Catalytic oxidation of toluene produces
phenol
200
SO2 is bubbled through hot sugar cane juice to
act as an acidifying agent.
201
The noble gas which occurs most abundantly in the atmosphere is
argon
202
Production of alcohol by fermentation of molasses is an __________ process.
aerobic
203
Main constituents of portland cement are calcium aluminate and
silicates
204
Pick out the wrong statement.
High early strength cement are made from materials having high silica to lime ratio.
205
Common salt is generally not produced commonly by __________ method from brine.
freeze drying
206
Which of the following is a detergent ?
Alkyl benzene sulphonate (ABS)
207
Sulphuric acid is mainly used in the __________ industry.
fertiliser
208
Pick out the wrong statement pertaining to nitric acid.
Arc process of nitric acid manufacture is economical as compared to Ostwald's process.
209
Alcohol percentage in molasses may be around
40
210
Main use of hydrazine is
as a rocket fuel
211
Main use of liquid nitrogen is in
refrigerative cooling.
212
Comparing sulphate process with sulphite process, we find that __________ in the later.
both temperature & pressure in the former is more than that
213
Which of the following is a disacchride ?
Sucrose
214
Proximate analysis of coal determines its __________ content.
moisture & volatile matter
215
Pick out the exothermic reaction out of the following:
CaC2 + H2O = Ca(OH)2 + C2H2
216
__________ is produced using polycondensation reaction.
Phenol formaldehyde
217
Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid.
vinyl chloride
218
In industrial nomenclature, alcohol means
ethanol
219
Which of the following is the purest form of water out of the following ?
Rain water
220
Use of water having dissolved oxygen in boilers promotes
corrosion
221
Unsaturated oils compared to saturated oils have
lower melting point & higher reactivity to oxygen.
222
With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide
decreases
223
Chemical formula of oleum is
H2S2O7
224
Electrodeposition of metals i.e. electroplating is never done on
refractories
225
Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.
strengthening
226
The biochemical treatment applied to sewage effluents is a process of
oxidation
227
Ultimate analysis of coal determines its __________ content.
carbon, hydrogen, nitrogen & sulphur
228
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.).
10
229
Sucrose content in cane sugar may be around __________ percent.
95
230
'Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of
final rolling out of paper.
231
Yellow glycerine is made into white, using
activated carbon
232
Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C.
30 to 50
233
Brackish water which contains mostly dissolved salt, can be purified by the __________ process.
reverse osmosis
234
Major component of flint glass is
lead oxide
235
Gypsum is chemically
calcium sulphate
236
Calcination of gypsum produces
plaster of paris
237
Phthalic anhydride is produced by the oxidation of
benzene
238
Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance.
pyrex
239
Zeigler process
produces high density polyethylene.
240
Massecuite is
none of these.
241
Carbon content of pitch (residue of coal tar distillation) is around __________ percent.
94
242
Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.
soft
243
Synthetic glycerine is produced from
propylene
244
A 'unit process' is exemplified by the
hydrogenation of oils
245
Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4 + 4H2, is not practised, as it is
all (a), (b) and (c).
246
Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to
reduce the variation in its viscosity with temperature.
247
Pick out the wrong statement pertaining to solvent extraction of oil.Rate of extraction
decreases as the moisture content of flakes increases.
248
Sea weeds are an important source of
iodine
249
Polythene is a/an __________ polymerisation product.
addition
250
Catalytic oxidation-dehydrogenation of methyl alcohol produces
formaldehyde
251
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
removing some quantity of SO3 during intermediate stage.
252
Tall oil obtained as a by-product from the black liquor recovery is
all (a), (b) & (c).
253
__________ is a polysacchride.
Starch
254
Styrene is produced from ethyl benzene by the process of
dehydrogenation
255
Acetone is produced by catalytic dehydrogenation of
isopropanol
256
Nitrogen is an essential component of
proteins
257
Bromine content in sea water may be around __________ ppm.
70
258
Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is
0.94
259
Poly tetraflouro ethylene (P.T.F.E.) is known as
teflon
260
Bakelite is
same as thermosetting phenol-formaldehyde.
261
__________ is produced by the dehydrogenation of ethyl benzene.
Styrene
262
Which of the following is used as a coagulant in water treatment ?
Ferrous sulphate
263
__________ paper is used in the manufacture of newsprint paper.
Groundwood
264
Hydrodenation of vegetable oils is a/an __________ reaction.
exothermic
265
Permanent hardness of water is due to the presence of calcium & magnesium
sulphates & chlorides
266
Concentration of sulphide ores is done usually by
froth floatation
267
Dacron is a/an
polyester
268
Sodium carbonate (soda ash) is not used in the manufacture of
detergents
269
Viscose rayon
utilises H2SO4, NaOH and CS2 during its manufacture.
270
Nylon 6-6 is manufactured from
hexamethylene diamine and adipic acid.
271
Glauber's salt is chemically represented by
Na2SO4.10H2O
272
Chemical name of Grignard reagent is
ethyl magnesium chloride.
273
Which of the following processes is absent in glass manufacturing process ?
Sintering
274
Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.
2.5
275
Dacron (or terylene) fibres as compared to nylon'fibres have
all (a), (b) and (c).
276
Grignard reagent is chemically known as
ethyl magnesium chloride.
277
The function of gypsum addition during cement making is to
decrease the cement setting rate.
278
Low purity oxygen is used for
chemical oxidation processes.
279
__________ is produced using molasses as the starting raw material.
ethyl alcohol
280
Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have
sharp melting points.
281
A substance produced by a living organism and capable of anti-microbial activity is called a/an
antibiotic
282
Deaeration of water in its treatment is necessary, as it
minimises its corrosiveness.
283
Hydrochloric acid is also known as
muriatic acid
284
Aryl benzene sulphonate (ABS) is a
detergent
285
Adipic acid is an intermediate in the manufacture of
nylon-66
286
The temperature in the calcium carbide furnace is __________ °C.
2000-2200
287
Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of
4 kgf/cm2 & 500°C.
288
Soaps remove dirt by
none of these.
289
Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?
Calcium & aluminium stearate
290
Chemical name of soda ash is
none of theseOut of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.
291
Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.
neutral sulphite semi-chemical
292
__________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace.
Limestone
293
Gun powder uses
all (a), (b), & (c)
294
Dichloro diphenyl __________ is the full form of DDT (an insecticide).
trichloroethane
295
The basic difference between vegetable oils and fats is in their
physical state
296
Which of the following is not a food additive?
Ammonium chloride
297
Alum is commercially produced from
bauxite
298
CaO is called
quick lime
299
Starting raw material for the manufacture of maleic anhydride is
either (a) or (b)
300
Pick out the wrong statement.
Presence of sodium sulphate in pulp makes the pulp bleachability poor.
301
Which of the following contains least amount of N2 ?
Coke oven gas
302
Calcination of limestone is not done in a __________ kiln for producing lime.
fixed bed
303
Neoprene is a
synthetic rubber
304
Saponification value/number of an oil or fat is a measure of its
average molecular weight.
305
Ethyl alcohol cannot be produced
none of these.
306
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
307
Cement mainly contains
CaO, SiO2, Al2O3
308
Sand and __________ is fused at 1300°C, to produce sodium silicate.
soda ash
309
Coke used for the production of calcium carbide should have
all (a), (b) and (c).
310
Sucrose is a disaccharide consisting of
glucose and fructose
311
Function of sodium thiosulphate (hypo) in development of photographic film/plate is to
remove unexposed silver halide.
312
High temperature carbonisation of coal takes place at __________ °C.
1100
313
White phosphorous is stored under water, because
its kindling temperature in dry air is very low.
314
__________ is not a constituent of gun powder.
Carbon
315
Hydrophilic group of a soap or detergent solution is
water loving
316
Rotary kiln is not involved in the production of
slaked lime from quick lime
317
Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.
60-70
318
Vanillin is a type of
flavour
319
Temporary hardness of water can be removed by
boiling
320
More than 100 percent of __________ is present in oleum.
H2SO4
321
Pure rectified spirit contains about __________ percent alcohol.
95
322
Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.
-183
323
Titanium dioxide is a/an __________ colour pigment.
white
324
Mercury cells for caustic soda manufacture, compared to diaphragm cells
none of these.
325
Cellulose percentage in bamboo fibre is about
50
326
Essential oils are usually obtained using
steam distillation
327
Impurities present in brine is normally removed by treatment with
all (a), (b) and (c).
328
Hydrogenation of oil/fat does not
none of these.
329
Solvay process as compared to dual process (i.e. modified Solvay process)
both (b) and (c).
330
Builders are added in soap to act as
cleaning power booster
331
H2S is scrubbed from refinery gases by absorption using
ethanol amine
332
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 Cl- ions
333
Zeolite is a/an
naturally occuring clay which is capable of exchanging cations.
334
Type of glass used in optical work is the __________ glass.
lead
335
Pick out the wrong statement pertaining to the soap manufacture.
Transparent soaps are made by cold process.
336
Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material ?
Teflon
337
Glass is
a super cooled liquid
338
Analgesic drugs are
pain relievers
339
Purity of oxygen used for blowing in steel making L.D. converter is 99.5%. The boiling point of oxygen is about __________ °C.
-183
340
Commonly used glass is known as the __________ glass.
soda
341
Fusion of limestone and __________ produces high alumina cement.
bauxite
342
Massacuits is a terminology used in the __________ industry.
sugar
343
The basic constituent of vegetable oils is
triglyceride
344
The most economical pulp for the production of newsprint would be the __________ pulp.
groundwood
345
Which of the following is the second major component of cement ?
SiO2
346
Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it
all (a), (b) and (c).
347
__________ are used as corrosion inhibitor for iron & steel in aqueous solutions.
Chromates
348
L.D. converter is used in the production of
steel
349
The terminology 'BTX' used in coal tar distillation industry refers to
benzene-toluene-xylene.
350
Which of the following is not responsible for causing permanent hardness of water ?
Ca(HCO3)2
351
In the Solvay process, the product from the calciner is
light soda ash
352
Commercially ethylene is produced from naphtha by
hydrocracking
353
Poly Vinyl Chloride (P.V.C.) is a __________ material.
thermoplastic
354
Pig iron is produced by blast furnaces in India using mostly the iron ore named
hematite
355
The difference between saponification value and acid value is
called ester value.
356
Fourdrinier machine is used in the manufacture of
paper
357
Pencillin is made employing __________ fermentation process.
aerobic batch
358
Sulphuric acid saturated with SO3 is called
oleum
359
Nylon 66 is so named because the
average degree of polymerisation of the polymer is 1966.
360
Wet chlorine gas produced during electrolysis of brine is dehydrated by
spraying 66° Be H2SO4 counter current to the flow of the gas.
361
CaSO4 .1/2 H2O is known as
plaster of Paris
362
__________ of quicklime produces slaked lime.
Hydration
363
Main product in calcium carbide-water reaction is
C2H2
364
Glauber's salt is chemically
none of these
365
Which of the following fuel gases contains maximum amount of carbon monoxide ?
L.D. converter gas
366
Baking soda is chemically represented by
NaHCO3
367
P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as
teflon
368
Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo ?
Depithing
369
Percentage of glycerene present in the spent lye obtained during soap manufacture is about
5
370
Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent.
10
371
Commercial production of Vanaspati is done by __________ of edible vegetable oils.
hydrogenation
372
Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene ?
AgO
373
Phenolic antiseptics are added in the __________ soap.
medicated
374
Solvay process is used for the manufacture of
soda ash
375
A mixture of chlorine & sodium bromide acts as a/an
fire retardant
376
Which is a high grade pulp ?
Sulphate pulp
377
Stereospecific agents are exemplified by
all (a), (b) & (c)
378
Starting material for the production of butadiene in India is
ethyl alcohol
379
Yellow phosphorus is transported under
water
380
Permanent hardness of water can be removed by
passing it through cation & anion exchangers.
381
Celluloid is chemically
cellulose nitrate
382
Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of
sulphuric acid
383
Which of the following is an explosive ?
All (a), (b), and (c)
384
Zeolite is used in the
water treatment.
385
Thermoplastic materials
none of these.
386
Carbon tetrachloride (CCl4) is the starting raw material for the manufacture of
perchloroethylene
387
Salt is added in the kettle during soap manufacture to separate
soap from lye.
388
Manufacture of phthalic anhydride uses __________ as a catalyst.
V2O5
389
Which of the following is not a product of coal tar distillation ?
None of these
390
Teflon is
poly tetrafluoroethylene (P.T.F.E.).
391
Chrome tanning and vegetable tanning are done for
light & heavy leather respectively.
392
Catalyst used during the manufacture of 'Vanaspati Ghee' is
nickel
393
Iron ore hametite is concentrated using
gravity separation.
394
Refractory bricks burnt at very high temperature have got
greater resistance to corrosion by slags.
395
Nitrile rubber is produced by the polymerisation of
acrylonitrile and butadiene.
396
Carbon disulphide is mainly used in the production of
viscose rayon.
397
99.5% purity oxygen is used in
all (a), (b), and (c).
398
Nylon-6 is manufactured from
caprolactum
399
Permanent hardness of water can be removed by
boiling it with Na2CO3.
400
Sizing material is incorporated in paper to
impart resistance to penetration by liquids.
401
Pick out the wrong statement.
Oils and fats are alkaloids.
402
Which of the following, when pyrolysed, produces perchloro-ethylene ?
Carbon tetrachloride
403
Chemical name of aspirin (an analgesic drug) is
acetylsalicylic acid
404
Which is the most efficient absorbant for SO3 out of the following ?
98%H2SO4
405
Coal tar is used as a
all (a), (b) and (c).
406
Caprolactum (a raw material for nylon-6 manufacture) is produced from
benzene
407
The purpose of adding Na2CO3 to water of low alkalinity is to
permit the use of alum as a coagulant.
408
Ca(OH)2 is called
slaked lime
409
Percentage of uranium in carnotite ore found in Jadugoda (Jharkhand) is about
0.1 to 0.5
410
Potassium is kept & transported under
kerosene oil
411
The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by
electrolytic reduction
412
Bakelite is chemically known as
phenol formaldehyde
413
Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine ?
H2
414
Phthalic anhydride is made by the
oxidation of naphthalene.
415
RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically
cyclo trimethylene trinitramine.
416
Raw material used in alcohol distilleries in India is
molasses
417
Oil produced by solvent extraction
neither (a) nor (b).
418
High acid value of an oil or fat is an indication of
storage under improper conditions.
419
Yeast is used in the manufacture of
wine
420
Liquefaction of gases can not be done by
merely compressing it beyond critical pressure.
421
Anion exchanger is regenerated usually with
NaOH
422
__________ is the major constituent of the Portland cement.
Tricalcium silicate
423
Catalytic oxidation of naphthalene produces
phthalic anhydride
424
Parathion and Malathion are
pesticides
425
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.
426
Dehydrogenation of ethyl benzene produces
styrene
427
Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces
dacron
428
Lindane is
BHC (Benzene Hexa Chloride) containing 99% γ-isomer.
429
Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate
is soluble in ammonium chloride and potassium chloride solution.
430
Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?
Sodium borate
431
In the production of soda ash by Solvay process, the by-product is
CaCl2
432
The ideal pulp for the manufacture of paper should have high __________ content.
cellulose
433
At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.
independent of
434
Which of the following is a constituent of vinegar ?
Both (a) and (b)
435
During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as
its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced).
436
Kopper-Totzek coal gasifier
can give ammonia synthesis gas (H2 + N2).
437
Addition of calcium oxide to water produces
all (a), (b) & (c)
438
Sodium bisulphite is used for __________ water.
both (a) & (b)
439
Riboflavin is a/an
vitamin
440
Flash point of most vegetable oils is about __________ °C.
200
441
Presence of sodium tripolyphosphate (an additive) in synthetic detergent
facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions).
442
Dense soda ash used in the manufacture of glass, is chemically represented by
Na2CO3.H2O
443
Reverse osmosis is normally used for the
desalination of brackish water to produce potable (drinking) water.
444
Hydrazine is largely used
as rocket fuel.
445
'Synthesis gas' meant for the synthesis of organic compound is a variable mixture of
CO & H2
446
Litharge is
lead oxide
447
Coagulant is used __________ filtration.
before
448
10% oleum comprises of 10% free
SO3
449
Use of chlorine in the treatment of sewage
helps in grease separation.
450
Removal of dirt/soil by soaps or detergent does not involve the __________ of soil.
precipitation
451
A unit operation is exemplified by the process of
desorption
452
The major constituents of glass are
sand, lime and soda ash
453
Margarine is a/an
fat
454
Oils and fats are converted to soap in a process called
saponification
455
Glycerine can be obtained from
fat
456
Blue vitriol is chemically
copper sulphate
457
Trinitro-toluene (TNT) is
an explosive.
458
Thorium is mainly used
for the manufacture of gas mantles.
459
During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to
avoid corrosion.
460
Good quality of edible salt is obtained from brine by the process of
vacuum evaporation
461
Electric bulbs are made of __________ glass.
flint
462
Which of the following is used as a binding material in soap to improve soap texture ?
Borax
463
An alkali metal salt of palmitic acid is known as
metallic soap
464
Washing soda is chemically represented by
Na2CO3.10H2O
465
Magnesium and calcium __________ cause temporary hardness of water.
bicarbonates
466
Which form of sulphur is the most stable at room temperature ?
Rhombic
467
Vegetable oils and fats basically differ in their
physical state
468
Average sulphur content in Indian pyrites is about __________ percent.
35
469
Oil is a/an
mixture of glycerides of fatty acids.
470
Which of the following is a constituent of coffee ?
Caffeine
471
Which of the following is the main constituent of the mother liquor produced in salt industry ?
Bromine
472
Silicon carbide is a/an
abrasive
473
Oxygen is produced by fractionation of air using __________ process.
either (a) or (b)
474
Trinitrotoluene (TNT), an explosive, is made by the nitration of
toluene
475
Which of the following is used as a coagulant in treating turbid water ?
Ferric sulphate
476
Carborundum consists mainly of
silicon carbide
477
Wax is a
mixture of esters of polyhydric alcohols excepting glycerine.
478
Catalyst used in the hydrogenation of oil is
nickel
479
Viscose rayon is
none of these.
480
Triple superphosphate is manufactured by reacting
phosphate rock with phosphoric acid.
481
Use of hydrated lime in water treatment
all (a), (b) and (c).
482
Higher vicosity index of a lubricating oil denotes
less changes in fluidity of oil with temperature.
483
Le-Blanc process is a primitive process for the manufacture of
soda ash
484
How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln?
1000°C
485
Cement setting under water employs a/an __________ process.
hydration
486
__________ are added in lacquers to remove film brittleness and to improve adhereness.
Plasticisers
487
Washing of coal is done to
both(b) and (c).
488
Systemic insecticides
are absorbed throughout the plant.
489
Dry ice (solidified CO2) is used for the
storage & shipment of frozen foods and ice-creams.
490
In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the
diamine and the dibasic acid.
491
Chemical formula of BHC, which is an insecticide is
C6H6Cl6
492
A bio-catalyst produced by living cells which acts independent of the cell is called a/an
enzyme
493
Pick out the wrong statement.
Benzene hexachloride is not a contact insecticide.
494
The product obtained on mixing calcium oxide with water is called
slaked lime
495
The major constituent of black liquor generated during paper manufacture is sodium
carbonate
496
Plaster of Paris is
both (a) and (b)
497
Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulphonic acid produces sodium dodecylbenzene sulphate, which is a/an
detergent
498
Conversion of SO2 to SO3 in Monsanto 4-pass converter is about __________ percent.
98
499
Coke oven gas consists mainly of
H2, & CH4
500
Chemical name of 'alum' is
aluminium sulphate.
501
Lithopaneis
ZnS (white pigment)
502
What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell ?
Cl2, H2 & NaOH solution.
503
__________ acid is the main constituent of cotton seed oil.
Linoleic
504
Chemical formula of 'salt cake' is
Na2SO4
505
Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in
all (a), (b) and (c).
506
Nicotine is
both (a) and (b).
507
Separation of fresh water from sea water can be done by the __________ operation.
reverse osmosis
508
Na2CO3.10H2O is called
washing soda
509
Reaction of an alcohol with organic acid is called the __________ reaction.
esterification
510
Ethanol amine is produced using ammonia and
ethylene oxide
511
__________ acid is an unsaturated fatty acid.
Oleic
512
CO & H2 are the constituents of
all (a), (b) and (c)
513
Economics of 'Solvay Process' depends upon the efficiency of
ammonia recovery and size of the plant
514
__________ is a thermosetting plastic.
Bakelite
515
Na2CO3 is called
soda ash
516
Flux addition during smelting of ore is done to
remove impurities/gangue.
517
Hydrazine is used in water treatment for the removal of
dissolved oxygen
518
Direct conversion of chemical energy into electrical energy is done in a
fuel cell.
519
Which of the following is not produced commercially from sea water ?
Iodine
520
Pick out the wrong statement.
none of these.
521
Nylon-6 as compared to Nylon-66 is having higher
none of these
522
Digestion of wood-base materials (for manufacture of pulp) is done to
remove lignin.
523
Soap cannot be used with hard water, because
they form insoluble calcium soaps which precipitate.
524
Which of the following is not an antibiotic ?
Quinine
525
The most reactive allotropic form of phosphorus is __________ phosphorus.
yellow
526
Plasticisers are added to synthetic plastics to
all (a), (b) and (c).
527
Rosin soap is added during paper manufacture to
impart resistance to penetration by liquids.
528
Hydrogen gas is not produced commercially (for nitrogeneous fertiliser manufacture) by
iron-steam reaction.
529
Carboxymethyl cellulose (CMC) is added in detergents to
prevent redeposition of soil on cleaned surface.
530
Synthesis gas is a mixture of
CO and H2
531
Which of the following impurities in feed water for high pressure boiler is the most detrimental ?
Silica
532
Which glass is usually used in optical work?
Lead glass
533
Fourdrinier machine is used in the manufacture of
paper
534
The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent.
anionic
535
Reaction of calcium carbide with water produces a gas, which is used
both (a) & (b).
536
Salt is the basic raw material for the manufacture of
caustic soda
537
Pick out the wrong statement.
TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being.
538
Hydrazine (N2H4) is used mainly as a/an
rocket fuel
539
Hydrocynic acid (HCN) is used as an insecticide for
citrus fruits
540
Molecular weight of plastics ranges from
20000 to 250000
541
Acrylonitrile is mainly used in the __________ industry.
dyeing
542
The enzyme which converts starch into the disacharides maltose is
diastase
543
Pick out the false statement pertaining to water treatment.
The zeolite water softening process reduces the hardness of water by not more than 50%.
544
Presence of H2S in raw water (to be chlorinated) results in the
increased dosage of chlorine to provide a disinfecting residual in the water.
545
Contact process of sulphuric acid manufacture
yields acid of higher concentration than chamber process.
546
Fat dispersed in water is exemplified by
butter
547
Maleic anhydride is produced by catalytic oxidation of
benzene
548
Catalyst used in the oxidation of benzene to produce maleic anhydride is
V2O5
549
Widely used method for the conditioning of boiler feed water is the
hot-lime soda process
550
Blue colour is imparted to glass by the addition of
CaO
551
In the manufacture of viscose rayon, the raw material used industrially is
fine teak wood
552
Bordeaux mixture is a/an
inorganic fungicide
553
Silicone is a/an
inorganic polymer
554
Nickel is not used as a catalyst in the __________ reaction.
shift conversion
555
Roasting of metallurgical ores is done mainly to
remove arsenic & sulphur.
556
Molasses is the starting material for the production of
alcohol
557
BHC (Benzene hexachloride) is made by the chlorination of benzene
which is an addition reaction.
558
Diaphragm electrolytic cell as compared to mercury electrolytic cell
requires lesser investment for similar capacity.
559
Calcareous & argillaceous materials are used in the manufacture of
cement
560
Pick out the wrong statement.
none of these.
561
Commercial production of calcium carbide requires limestone and __________ as raw materials.
coke
562
Which one of the following is not likely to be a constituent of vegetable oils ?
Citric acid
563
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
564
The process involved in converting rubber into a thin sheet or coating it on fabric is called
calendering
565
Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.
both (b) and (c)
566
Air used in aerobic fermentation must be sterilized, otherwise the
contamination of pure culture would result.
567
Alkylbenzene sulfonate (ABS) is a
detergent
568
High temperature carbonisation of coal produces
none of these.
569
Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.
7-14 and 14-30
570
Setting of plaster of paris is accompanied with
hydration
571
Process conditions in fermentator used for production of penicillin is
25°C, 2 atm.
572
Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of
arsenic
573
Sodium chloride content in sea water is about __________ gms/litre.
25
574
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.
575
High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to
both (a) and (b).
576
Polyvinyl chloride (PVC) is
made by employing emulsion polymerisation.
577
Bleaching of paper pulp is done with
chlorine or chlorine dioxide
578
Pick out the wrong statement.
none of these.
579
Isopropyl benzene produced by alkylation of benzene with propylene is known as
cumene
580
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 - Fe/Al2O3
581
For the hydrogenation of oils __________ (A) __________ is commonly used as catalyst and __________ (B) __________ is a catalyst poison.
(A) nickel (B) sulphur
582
Main constituents of natural rubber is
polyisoprene
583
Highly porous refractory bricks are
none of these.
584
Fumigant insecticides
emit poisonous vapour.
585
Which of the following is an endothermic reaction ?
Both (b) and (c).
586
Fermentator temperature during production of alcohol from molasses is around __________ °C.
30
587
Which of the following coals has the highest calorific value ?
Anthracite
588
Which of the following is not an abrasive material ?
Bakelite
589
Pick out the wrong statement.
Red color is imparted to glass by addition of arsenic oxide.
590
Finely ground calcium aluminate & silicate is a/an
cement
591
Cooking liquor in case of sulphite process is
sodium sulphite and sodium bisulphite.
592
90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C.
10-30
593
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.
non-drying
594
Fats as compared to oils have
less unsaturated glycerides of fatty acids.
595
Thermal pyrolysis of ethylene dichloride produces
vinyl chloride
596
The main component of pyrex glass is
lead
597
Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove
all (a), (b) and (c)
598
__________ is an ore concentrating metallurgical process involving a chemical change.
Roasting
599
Basic oxide is absent in __________ glass.
quartz
600
Graphite is a/an
both (b) and (c).
601
Nylon-6 is a
polyamide
602
Enzymes are
all (a), (b) and (c).
603
Multistage catalytic converter is not used in the
NH3 synthesis reaction.
604
The main product of high temperature carbonisation of coal is
coke
605
__________ is a thermosetting plastic.
Epoxy polymer
606
In an integrated steel plant, NH3 present in coke oven gas is normally recovered as
(NH4)2SO4
607
Flexible foam (for mattresses) is usually made of
polyurethanes
608
Glycerine is a by-product of the __________ industry.
soap
609
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.
610
Permanent hardness of water can be removed by
all (a), (b), and (c).
611
Chalcopyrite is the main ore of
copper
612
The end bleaching agent used to move last traces of colour bodies from the pulp is
chlorine dioxide (ClO2)
613
Bio-degradable detergents
can be readily oxidised.
614
Sea water contains about __________ ppm of bromine.
70
615
Which allotrope of sulphur is insoluble in carbon disulphide ?
Plastic sulphur
616
Lubricating greases are a mixture of
mineral oil, soap and additives.
617
Metallic soap is __________ salt of fatty acids.
aluminium or calcium
618
Cation exchanger is regenerated usually with
H2SO4
619
In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because
water forms an acid mist, which is difficult to absorb.
620
Bitterns is a/an
none of these.
621
The most widely used coagulant for removing suspended impurities from water is
alum
622
Main constituent of limestone is
CaCO3
623
__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.
Chlorine
624
Fat splitting catalyst is
ZnO
625
Phthalic anhydride is used
as plasticisers
626
Penicillin is separated from fermented broth by
extraction with amyl or butyl acetate.
627
__________ process is used for producing soda ash.
Solvay
628
Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on
slaked lime
629
Which of the following is an unsaturated fatty acid ?
Oleic acid
630
The yield of tar from high temperature carbonisation of dry coal is about __________ percent.
3
631
__________ is used as a flux in the smelting of copper ore like chalcopyrite.
Silica/quartz
632
Phenol formaldehyde is produced by condensation polymerisation. It is also known as
bakelite
633
Hydrogenation of oil does not
none of these.
634
Main constituents of cotton fiber is
cellulose
635
CaCl(OCl) is the chemical formula of
bleaching powder
636
Which is the most suitable dye for synthetic fibres ?
Acid dye
637
Pick out the wrong statement.
none of these.
638
Pick out the wrong statement.
Acetylene gas can not be used for illumination purpose.
639
Hydrolysis of sugar is called
inversion
640
Sulphuric acid completely saturated with sulphur trioxide is called
concentrated sulphuric acid.
641
Fish contains about __________ percent oil.
20
642
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.
643
Polymethyl methacrylate (PMMA) is known as
perspex
644
Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.
copper
645
Percentage of alcohol in beer may be around __________ percent.
2-8
646
Which of the following is an ore of iron ?
Hematite
647
Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process ?
NH3
648
High purity nitrogen is used in
both (a) & (b).
649
Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.
brine and coal
650
Naphthalene is removed from coke oven gas by
scrubbing with wash oil.
651
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.
1600
652
Which of the following is not present in bagasse fibre ?
None of these
653
Nitric acid is not used in the manufacture of
detergents
654
Naphthols are derivates of
naphthalene
655
Fermentation is adversely affected by the
high concentration.
656
Extraction of __________ employs an electrolytic process.
aluminium
657
Dechlorination of treated water is necessary to
remove chlorinous taste.
658
Fire clay is __________ refractory material.
an acidic
659
An oil is converted into fat by its
hydrogenation
660
Production of one ton of cement requires about __________ tons of limestone.
1.2
661
Low temperature carbonisation of coal takes place at __________ °C.
700
662
Shaving soaps are
soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property.
