Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

INDIABIX > chem process (sec 2-5) > Flashcards

chem process (sec 2-5) Flashcards

1
Q

Calgon used in water treatment is chemically

A

sodium hexametaphosphate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which oil is preferred for paint manufacture ?

A

drying oil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Styrene butadiene rubber (SBR) is

A

synthetic polymer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at

A

5 atm, 275°C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Glycerine is not used in the

A

none of these fucker hahahahahah

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Cumene is the starting material for the production of

A

phenol and acetone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The type of high refractive index glass used in optical instruments is __________ glass.

A

flint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

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

A

vanadium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Most commonly used rubber vulcanising agent is

A

sulphut

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Terylene is

A

both a & b, dacron and polyester

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Free alkali in a toilet soap is __________ that in a laundary shop.

A

less than

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q
A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Dehydrogenation of isopropanol produces

A

acetone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

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

A

D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Concentration of hydrogen peroxide is done by

A

vacuum crystallization

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Helium is produced on commercial scale from

A

natural gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Fermentation of molasses to produce ethyl alcohol is done at __________ °C

A

20-30

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

The catalyst used in the manufacture of DDT is

A

20% oleum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Most widely and commonly used coagulant for the removal of suspended impurities in water is

A

alum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

__________ is used as a catalyst in fat splitting.

A

ZnO

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Which of the following is not produced on commercial scale from sea water?

A

sodium sulphate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Heating of __________ to 120°C, produces plaster of paris.

A

gypsum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

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

A

D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Which of the following has sodium bicarbonate as its main constituent ?

A

baking powder

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

In premitive days, __________ was being manufactured by Leblanc Process.

A

soda ash

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at

A

SASOL (in South Africa)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Lurgi coal gasifier is a pressurised __________ bed reactor.

A

moving

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils

A

cause cholesterol build up and blood clotting

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Paper grade bamboo contains about __________ percent cellulose.

A

5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Carboxymethyl cellulose (CMC) is added in detergents to act as a/an

A

anti soil redeposition agent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Vulcanisation of rubber

A

converts its plasticity into elasticity.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Raw materials for ‘Solvay Process’ for manufacture of the soda ash are

A

salt, limestone and coke or gas.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Chloral is used in the manufacture of

A

DDT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q
A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

Bromine is used in the preparation of

A

ALL ( fire extinguishing compounds. fire proofing agents. dyes and antiknock compounds.)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

Sudden temperature fluctuation does not affect pyrex glass, because of its

A

low co-efficient of expansion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

The process used for the manufacture of ethyl alcohol from molasses is

A

none of these

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
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.

A

<10

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

Absorption of SO3 in 97% H2SO4 is

A

exothermic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

_________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.

A

Ostwald’s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the

A

car battery solution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is

A

alumina

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

A good quality coal should have

A

none of these :)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

Zeolite used in water softening process (cation exchange) is regenerated by washing with

A

brine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

The catalyst used in shift converter is

A

nicket

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

Which of the following is a detergent ?

A

Alkyl benzene sulphonate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

Drinking (potable) water treatment does not involve

A

softening

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

Phenol formaldehyde resin is used as an adhesive in making

A

laminates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

Pick out the correct statement.

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

DDT should not be allowed to come in contact with iron (during its manufacture) to

A

avoid its decomposition.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively

A

oxides of nitrogen & V2O5 on a porous carrier.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

DDT stands for

A

dichloro-diphenyl-trichloroethane.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

Phosphoric acid is prepared from

A

rock phosphate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used

A

as a lubricant.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda ?

A

Lime-soda process

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

Bleaching action of bleaching powder is due to its __________ properties.

A

oxidising

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
56
Q

Solvent extracted oil

A

none of these.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
57
Q

Which of the following is not required in the manufacture of soda ash by Solvay process ?

A

Nitric acid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
58
Q

Saponification number of an oil or fat

A

all (gives an idea about its molecular weight.
is inversely proportional to its molecular weight.
detects its adulteration.)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
59
Q

The purpose of tanning in leather industry is to

A

stiffen the leather.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
60
Q

Lime and soda ash are added to water to remove

A

bicarbonates & sulphates of calcium and magnesium.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
61
Q

Kaoline is a/an

A

refractory material

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
62
Q

Hydrogenation of edible vegetable oils

A

all (is an exothermic reaction.
increases their melting point.
is done in presence of nickel catalyst.)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
63
Q

Phenol is mainly used

A

to produce phenol formaldehyde.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
64
Q

Main constituent of dolomite is

A

MgCO3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
65
Q

Conversion of CO to CO2 by steam in presence of a catalyst is called

A

shift conversion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
66
Q

Refractory bricks having high thermal conductivity is desirable, when it is to be used in the

A

recuperator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
67
Q

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

A

Cl2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
68
Q

Plasticisers are added to paints to

A

give elasticity & prevent cracking of the film.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
69
Q

Resistance to fusion of the refractory under a steady rising temperature condition is called

A

refractoriness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
70
Q

Portland cement consists mainly of

A

CaO & SiO2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
71
Q

__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.

A

Pyrex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
72
Q

The amount of benzene present in pure benzol is about __________ percent.

A

70

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
73
Q

Cumene (isopropyl benzene) is made by

A

propylene alkylation of benzene.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
74
Q

Which of the following is not a pyrite ore?

A

Siderite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
75
Q
A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
76
Q

Mannheim furnace is used in the manufacture of

A

hydrochloric acid.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
77
Q

Thermosetting materials

A

are cross-linked molecules.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
78
Q

Pick out the wrong statement. Iodine value of an oil or fat is

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
79
Q

Nickel is not used as a catalyst in the

A

Ostwald’s process of HNO3 manufacture.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
80
Q

iron is the purest form of iron.

A

Wrought

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
81
Q

Enamels

A

give good glossy finish.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
82
Q

Varnish does not contain

A

pigment

82
Q

Black liquor is converted into white liquor by

A

evaporation and burning the concentrate followed by causticisation of products.

83
Q

Alcohol is produced by the

A

hydrolysis of an ether

84
Q

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

A

teflon

85
Q

Solvent used for extraction of oil is

A

hexane

86
Q

Insulin is an __________ drug.

A

none of these

87
Q

Liquor poisoning generally occurs due to the presence of __________ in it.

A

methyl alcohol

88
Q

Neoprene is chemically known as

A

polychloroprene

89
Q

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.

A

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

90
Q

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.

A

Raw materials for DDT manufacture are benzene and chlorine.

91
Q
A
92
Q

Molecular weights of polymers are in the range of

A

10^2 - 10^7

93
Q

Sulphur removal by heating of pyrite ore in presence of air is called its

A

roasting

94
Q

Deacon’s method is used for the manufacture of

A

chlorine

95
Q

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.

A

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

96
Q

Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass.

A

borosilicate

97
Q

Prussian blue is chemically represented by

A

Fe4 [Fe (CN6)3]

98
Q

The most stable allotropic form of phosphorous is the __________ phosphorous.

A

black

99
Q

Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of

A

nitric acid

100
Q

Function of thinner in a paint is to

A

suspend pigments & dissolve film forming materials.

101
Q

Starting material for the production of styrene butadiene rubber (SBR) is

A

both (a) & (b) (
ethyl alcohol
ethylene)

102
Q

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

A

None of these

103
Q

Which of the following processes can remove both temporary as well as permanent hardness of water ?

A

Distillation

104
Q

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.

A

none of these.

104
Q

Rancidity of the fatty oil can be reduced by its

A

hydrogenation

105
Q

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)

A

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

106
Q

_________ of rubber decreases after its vulcanisation.

A

Tackiness

107
Q

Boiling of water containing temporary hardness produces

A

CO2

108
Q

Starting material for the commercial production of ethyl alcohol in India is

A

molasses

109
Q

Phenol formaldehyde

A

employs condensation polymerisation.

110
Q

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

A

Hexane

111
Q

Shrinkage volume in cement setting does not depend upon the

A

sand to cement ratio.

112
Q

Bisphenol A is produced by the condensation of acetone with

A

phenol

113
Q

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.

A

sodium sulphide & sodium carbonate.

114
Q

Presence of carbonaceous matter in the sewage

A

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

115
Q

A mineral is termed as ‘ore’, if

A

a metal can be economically extracted from it.

116
Q

In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst

A

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

117
Q

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

A

sqrt p

118
Q

Oleum produces fumes of

A

SO3

119
Q

20% oleum means that in 100 kg oleum, there are 20 kg of

A

SO3 and 80kg of H2SO4.

120
Q

Chloramines are used in water treatment for

A

disinfection and control of taste & odour.

121
Q

Glycerine is recovered from lye by

A

evaporation followed by vacuum distillation.

122
Q

Inversion of sucrose produces

A

glucose

123
Q

Enzymes are organic catalysts used in the __________ reactions.

A

biochemical

124
Q

Linde process of gas liquefaction employs

A

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

125
Q

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

A

50

126
Q

Ore concentration by froth floatation utilises the __________ of ore particles.

A

wetting characteristics

127
Q

The main use of activated carbon in water treatment is to control

A

taste and odour

128
Q

The most commonly used substance to speed up the sedimentation of sewage is

A

lime

129
Q

Sucrose is a

A

disacchride

130
Q

Sugar content in sugarcane on cane basis is about __________ percent by weight.

A

5 to 10

131
Q

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%.

A

Total sugar content in molasses is about 10%.

132
Q

The major use of butadiene is

A

in the manufacture of synthetic rubber.

133
Q

The manufacture of Kraft pulp is done by a/an __________ process.

A

alkaline

134
Q

Antibiotic

A

inhibits/destroys the growth of microorganisms.

135
Q

Which of the following paper does not require a filler during manufacture ?

A

Blotting paper

136
Q

Industrial production of chloroform requires acetone and

A

calcium hypochlorite

137
Q

Pencillin, an antibiotic drug was discovered by

A

Alexender

138
Q

Styrene (a monomer for the production of polystyrene) is commercially produced by

A

catalytic dehydrogenation of ethyl benzene.

139
Q

Hydrogenation of oil takes place in a/an __________ reactor.

A

trickle bed

140
Q

Fatty material used in soap making is

A

tallow

141
Q

__________ glass is used for the manufacture of optical glass.

A

Flint

142
Q

Thermosetting plastic materials

A

can not be melted after forming.

143
Q

Favourable conditions for the liquefaction of gases in general are

A

high pressure & low temperature.

144
Q

In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed :

A

furnace → converter → absorber

145
Q

__________ nature of hypo (sodium thiosulphate) makes it useful in photography.

A

Complex forming

146
Q
A
147
Q

__________ is an ore of lead.

A

Galena

148
Q

Which of the following is an yellow pigment ?

A

Lead chromates

149
Q

Catalytic oxidation of toluene produces

A

phenol

150
Q

SO2 is bubbled through hot sugar cane juice to

A

act as an acidifying agent.

151
Q

The noble gas which occurs most abundantly in the atmosphere is

A

argon

152
Q

Production of alcohol by fermentation of molasses is an __________ process.

A

aerobic

153
Q

Main constituents of portland cement are calcium aluminate and

A

silicates

154
Q

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.

A

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

155
Q

Common salt is generally not produced commonly by __________ method from brine.

A

freeze drying

156
Q

Sulphuric acid is mainly used in the __________ industry.

A

fertiliser

157
Q

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.

A

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

158
Q

Alcohol percentage in molasses may be around

A

40

159
Q

Main use of hydrazine is

A

as a rocket fuel

160
Q

Main use of liquid nitrogen is in

A

refrigerative cooling.

161
Q

Comparing sulphate process with sulphite process, we find that __________ in the later.

A

both temperature & pressure in the former is more than that

161
Q

Proximate analysis of coal determines its __________ content.

A

moisture & volatile matter

161
Q

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)

A

CaC2 + H2O = Ca(OH)2 + C2H2

162
Q

__________ is produced using polycondensation reaction.

A

Phenol formaldehyde

163
Q
A
164
Q

Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid.

A

vinyl chloride

164
Q

In industrial nomenclature, alcohol means

A

ethanol

164
Q

Which of the following is the purest form of water out of the following ?

A

Rain water

165
Q

Use of water having dissolved oxygen in boilers promotes

A

corrosion

165
Q

Unsaturated oils compared to saturated oils have

A

lower melting point & higher reactivity to oxygen.

166
Q
A
167
Q

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

A

decreases

168
Q
A
169
Q

Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.

A

strengthening

169
Q

Electrodeposition of metals i.e. electroplating is never done on

A

refractories

170
Q

Chemical formula of oleum is

A

H2S2O7

171
Q
A
171
Q

The biochemical treatment applied to sewage effluents is a process of

A

oxidation

172
Q

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.)

A

10

172
Q

carbon, hydrogen, nitrogen & sulphur

A

carbon, hydrogen, nitrogen & sulphur

173
Q

Sucrose content in cane sugar may be around __________ percent.

A

95

174
Q

‘Hollander beater’ machine used in the paper manufacturing plant does not accomplish the task of

A

final rolling out of paper.

174
Q

Yellow glycerine is made into white, using

A

activated carbon

175
Q

Brackish water which contains mostly dissolved salt, can be purified by the __________ process.

A

reverse osmosis

176
Q

Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C.

A

30 to 50

177
Q

Major component of flint glass is

A

lead oxide

178
Q

Gypsum is chemically

A

calcium sulphate

179
Q

Calcination of gypsum produces

A

plaster of paris

180
Q

Phthalic anhydride is produced by the oxidation of

A

benzene

181
Q

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

A

pyrex

182
Q

Zeigler process

A

produces high density polyethylene.

183
Q
A
184
Q

Massecuite is

A

none of these.

185
Q

Carbon content of pitch (residue of coal tar distillation) is around __________ percent.

A

94

185
Q

Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.

A

soft

186
Q

Synthetic glycerine is produced from

A

propylene

187
Q

A ‘unit process’ is exemplified by the

A

hydrogenation of oils

188
Q

Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4 + 4H2, is not practised, as it is

A

all

189
Q

Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to

A

reduce the variation in its viscosity with temperature.

190
Q

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.

A

temperature.
decreases as the moisture content of flakes increases.

191
Q

Sea weeds are an important source of

A

iodine

192
Q

Polythene is a/an __________ polymerisation product.

A

addition

193
Q

Catalytic oxidation-dehydrogenation of methyl alcohol produces

A

formaldehyde

INDIABIX (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions