chem process (sec 6-9) Flashcards
1
Q
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
A
removing some quantity of SO3 during intermediate stage.
2
Q
Tall oil obtained as a by-product from the black liquor recovery is
A
all (a), (b) & (c).
3
Q
__________ is a polysacchride.
A
Starch
4
Q
Styrene is produced from ethyl benzene by the process of
A
dehydrogenation
5
Q
Acetone is produced by catalytic dehydrogenation of
A
isopropanol
6
Q
Nitrogen is an essential component of
A
proteins
7
Q
Bromine content in sea water may be around __________ ppm.
A
70
8
Q
Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is
A
0.94
9
Q
Poly tetraflouro ethylene (P.T.F.E.) is known as
A
teflon
10
Q
Bakelite is
A
same as thermosetting phenol-formaldehyde.
11
Q
__________ is produced by the dehydrogenation of ethyl benzene.
A
Styrene
12
Q
Which of the following is used as a coagulant in water treatment ?
A
Ferrous sulphate
13
Q
__________ paper is used in the manufacture of newsprint paper.
A
Groundwood
14
Q
Hydrodenation of vegetable oils is a/an __________ reaction.
A
exothermic
15
Q
Permanent hardness of water is due to the presence of calcium & magnesium
A
sulphates & chlorides
16
Q
Concentration of sulphide ores is done usually by
A
froth floatation
17
Q
Dacron is a/an
A
polyester
18
Q
Sodium carbonate (soda ash) is not used in the manufacture of
A
detergents
19
Q
Viscose rayon
A
utilises H2SO4, NaOH and CS2 during its manufacture.
20
Q
Nylon 6-6 is manufactured from
A
hexamethylene diamine and adipic acid.
21
Q
Glauber’s salt is chemically represented by
A
Na2SO4.10H2O
22
Q
Chemical name of Grignard reagent is
A
ethyl magnesium chloride.
23
Q
Which of the following processes is absent in glass manufacturing process
A
Sintering
24
Q
Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.
A
2.5
25
Dacron (or terylene) fibres as compared to nylon'fibres have
all (a), (b) and (c).
better heat & acid resistant properties.
poorer resistance to alkalis.
poorer dyeability.
26
The function of gypsum addition during cement making is to
decrease the cement setting rate.
27
Low purity oxygen is used for
chemical oxidation processes.
28
__________ is produced using molasses as the starting raw material.
Ethyl alcohol
29
Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have
sharp melting points.
30
A substance produced by a living organism and capable of anti-microbial activity is called a/an
antibiotic
31
Deaeration of water in its treatment is necessary, as it
minimises its corrosiveness.
32
Hydrochloric acid is also known as
muriatic acid
33
Adipic acid is an intermediate in the manufacture of
nylon-66
34
The temperature in the calcium carbide furnace is __________ °C.
2000-2200
35
Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of
4 kgf/cm2 & 500°C.
36
Soaps remove dirt by
none of these.
increasing the surface tension.
decreasing wettability.
supplying hydrophyllic group.
37
Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?
Calcium & aluminium stearate
38
Chemical name of soda ash is
none of these
sodium bicarbonate
sodium thiosulphate
potassium carbonate
39
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
40
__________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace.
Limestone
41
Gun powder uses
all (a), (b), & (c)
sulphur
charcoal
potassium nitrate
42
Dichloro diphenyl __________ is the full form of DDT (an insecticide).
trichloroethane
43
The basic difference between vegetable oils and fats is in their
physical state
44
Which of the following is not a food additive?
Ammonium chloride
45
Alum is commercially produced from
bauxite
46
CaO is called
quick lime
47
Starting raw material for the manufacture of maleic anhydride is
either (a) or (b)
n-butene
benzene
48
Pick out the wrong statement.
Fibrillation of fibre during paper manufacture is done to develop the strength in paper.
Alkali consumption in digestion/cooking of bamboo is measured in terms of permangnate number.
Bagasse fibre contains both lignin & cellulose.
Presence of sodium sulphate in pulp makes the pulp bleachability poor.
Presence of sodium sulphate in pulp makes the pulp bleachability poor.
49
Which of the following contains least amount of N2 ?
Coke oven gas
50
Calcination of limestone is not done in a __________ kiln for producing lime.
fixed bed
51
Neoprene is a
synthetic rubber
52
Saponification value/number of an oil or fat is a measure of its
average molecular weight.
53
Ethyl alcohol cannot be produced
none of these.
from waste sulphite substrate of paper mills.
by esterification and hydroloysis of ethylene.
from molasses.
54
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
55
Cement mainly contains
CaO, SiO2, Al2O3
56
Sand and __________ is fused at 1300°C, to produce sodium silicate.
soda ash
57
Coke used for the production of calcium carbide should have
all (a), (b) and (c).
low ash content.
low ignition temperature.
high electrical resistivity.
58
Sucrose is a disaccharide consisting of
glucose and fructose
59
Function of sodium thiosulphate (hypo) in development of photographic film/plate is to
remove unexposed silver halide.
60
High temperature carbonisation of coal takes place at __________ °C
1100
61
White phosphorous is stored under water, because
its kindling temperature in dry air is very low.
62
_________ is not a constituent of gun powder.
Carbon
63
Hydrophilic group of a soap or detergent solution is
water loving
64
Rotary kiln is not involved in the production of
slaked lime from quick lime
65
Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.
60-70
66
Vanillin is a type of
flavour
67
Temporary hardness of water can be removed by
boiling.
68
More than 100 percent of __________ is present in oleum.
H2SO4
69
Pure rectified spirit contains about __________ percent alcohol.
95
70
Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.
-183
71
Titanium dioxide is a/an __________ colour pigment.
white
72
Mercury cells for caustic soda manufacture, compared to diaphragm cells
none of these.
require lower initial investment.
require more power.
produce lower concentration NaOH.
73
Cellulose percentage in bamboo fibre is about
50
74
Essential oils are usually obtained using
steam distillation
75
Impurities present in brine is normally removed by treatment with
all (a), (b) and (c).
NH3 and CO2.
lime and soda ash.
lime, ammonia and carbon.
76
Hydrogenation of oil/fat does not
none of these.
improve its resistance to rancid oxidation.
raise its melting point.
remove double bonds.
77
Solvay process as compared to dual process (i.e. modified Solvay process)
both (b) and (c).
has less corrosion problems.
involves higher investment in NH3 recovery units than that for crystallisation units for NH4Cl.
78
Builders are added in soap to act as
cleaning power booster
79
H2S is scrubbed from refinery gases by absorption using
ethanol amine
80
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
81
Zeolite is a/an
naturally occuring clay which is capable of exchanging cations.
82
Type of glass used in optical work is the __________ glass.
lead
83
Pick out the wrong statement pertaining to the soap manufacture.
Transparent soaps are made by cold process.
Organic pigments are used as colouring materials in the soap manufacture.
Both laundary as well as toilet soaps are manufactured by hot process.
Colourless rosin is used in the manufacture of laundary soaps.
Transparent soaps are made by cold process.
84
Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material ?
Teflon
85
Glass is
a super cooled liquid
86
Analgesic drugs are
pain relievers
87
Commonly used glass is known as the __________ glass.
soda
88
fusion of limestone and __________ produces high alumina cement.
bauxite
89
Massacuits is a terminology used in the __________ industry.
sugar
90
The basic constituent of vegetable oils is
triglyceride
91
The most economical pulp for the production of newsprint would be the __________ pulp.
groundwood
92
Which of the following is the second major component of cement ?
SiO2
93
Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it
all (a), (b) and (c).
has larger production capacity per unit cell.
consumes less power per ton of Cl2 produced.
produces high purity (70%) caustic soda directly.
94
are used as corrosion inhibitor for iron & steel in aqueous solutions.
Chromates
95
L.D. converter is used in the production of
steel
96
The terminology 'BTX' used in coal tar distillation industry refers to
benzene-toluene-xylene.
97
Which of the following is not responsible for causing permanent hardness of water ?
Ca(HCO3)2
98
In the Solvay process, the product from the calciner is
light soda ash
99
Commercially ethylene is produced from naphtha by
hydrocracking.
100
Poly Vinyl Chloride (P.V.C.) is a __________ material.
thermoplastic
101
Pig iron is produced by blast furnaces in India using mostly the iron ore named
hematite
102
The difference between saponification value and acid value is
called ester value.
103
Fourdrinier machine is used in the manufacture of
paper
104
Pencillin is made employing __________ fermentation process.
aerobic batch
105
Sulphuric acid saturated with SO3 is called
oleum.
106
Nylon 66 is so named because the
average degree of polymerisation of the polymer is 1966.
107
Wet chlorine gas produced during electrolysis of brine is dehydrated by
spraying 66° Be H2SO4 counter current to the flow of the gas.
108
CaSO4 1/2.H2O is known as
plaster of Paris
109
__________ of quicklime produces slaked lime.
Hydration
110
Main product in calcium carbide-water reaction is
C2H2
111
Glauber's salt is chemically
none of these
calcium sulphate
potassium sulphate
potassium chlorate
112
Which of the following fuel gases contains maximum amount of carbon monoxide ?
L.D. converter gas
113
Baking soda is chemically represented by
NaHCO3
114
Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo ?
Depithing
115
Percentage of glycerene present in the spent lye obtained during soap manufacture is about
5
116
Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent.
10
117
Commercial production of Vanaspati is done by __________ of edible vegetable oils.
hydrogenation
118
Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene ?
AgO
119
Phenolic antiseptics are added in the __________ soap.
medicated
120
Solvay process is used for the manufacture of
soda ash
121
A mixture of chlorine & sodium bromide acts as a/an
fire retardant
122
Which is a high grade pulp ?
Sulphate pulp
123
Stereospecific agents are exemplified by
all (a), (b) & (c)
radiation
supported metal oxide catalysts
ziegler catalysts
124
Starting material for the production of butadiene in India is
ethyl alcohol
125
Yellow phosphorus is transported under
water
126
Permanent hardness of water can be removed by
passing it through cation & anion exchangers.
127
Celluloid is chemically
cellulose nitrate
128
Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of
sulphuric acid
129
Which of the following is an explosive ?
All (a), (b), and (c)
Nitroglycerene
Trintrotoluene (TNT)
Cellulose nitrate
130
Zeolite is used in the
water treatment.
131
Thermoplastic materials
are heavily branched molecules.
132
Carbon tetrachloride (CCl4) is the starting raw material for the manufacture of
perchloroethylene
133
Salt is added in the kettle during soap manufacture to separate
soap from lye.
134
Manufacture of phthalic anhydride uses __________ as a catalyst.
V2O5
135
Which of the following is not a product of coal tar distillation ?
None of these
Anthracene
Cresote oil
Carbolic oil
136
Chrome tanning and vegetable tanning are done for
light & heavy leather respectively.
137
Catalyst used during the manufacture of 'Vanaspati Ghee' is
nickel
138
Iron ore hametite is concentrated using
gravity separation.
139
Refractory bricks burnt at very high temperature have got
greater resistance to corrosion by slags.
140
Nitrile rubber is produced by the polymerisation of
acrylonitrile and butadiene.
141
Carbon disulphide is mainly used in the production of
viscose rayon.
142
99.5% purity oxygen is used in
all (a), (b), and (c).
cutting and welding by oxy-acetylene flame.
hospitals for medicinal purposes.
gas masks and artificial breathing apparatus.
143
Nylon-6 is manufactured from
caprolactum.
144
Permanent hardness of water can be removed by
boiling it with Na2CO3
145
Sizing material is incorporated in paper to
impart resistance to penetration by liquids.
146
Pick out the wrong statement.
Pasteurisation of milk involves moderate heating followed by cooling.
Bakeries and breweries make use of yeasts.
Enzyme is a complex nitrogenous compound.
Oils and fats are alkaloids.
Oils and fats are alkaloids.
147
Which of the following, when pyrolysed, produces perchloro-ethylene ?
Carbon tetrachloride
148
Chemical name of aspirin (an analgesic drug) is
acetylsalicylic acid
149
Which is the most efficient absorbant for SO3 out of the following ?
98%H2SO4
150
Coal tar is used as a
all (a), (b) and (c).
binding material for coal briquettes.
fuel in rotary kiln.
binder in making carbon electrodes.
151
Caprolactum (a raw material for nylon-6 manufacture) is produced from
benzene
152
The purpose of adding Na2CO3 to water of low alkalinity is to
permit the use of alum as a coagulant.
153
Ca(OH)2 is called
slaked lime
154
Percentage of uranium in carnotite ore found in Jadugoda (Jharkhand) is about
0.1 to 0.5
155
Potassium is kept & transported under
kerosene oil
156
The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by
electrolytic reduction
157
Bakelite is chemically known as
phenol formaldehyde
158
Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine ?
H2
159
Phthalic anhydride is made by the
oxidation of naphthalene.
160
RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically
cyclo trimethylene trinitramine.
161
Raw material used in alcohol distilleries in India is
molasses
162
Oil produced by solvent extraction
neither (a) nor (b).
has low free fatty acid content.
is odourless.
163
High acid value of an oil or fat is an indication of
storage under improper conditions.
164
Yeast is used in the manufacture of
wine
165
Liquefaction of gases can not be done by
merely compressing it beyond critical pressure.
166
Anion exchanger is regenerated usually with
NaOH
167
__________ is the major constituent of the Portland cement.
Tricalcium silicate
168
Catalytic oxidation of naphthalene produces
phthalic anhydride
169
Parathion and Malathion are
.
pesticides
170
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.
171
Dehydrogenation of ethyl benzene produces
styrene
172
Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces
dacron
173
Lindane is
BHC (Benzene Hexa Chloride) containing 99% γ-isomer.
174
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.
175
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
176
In the production of soda ash by Solvay process, the by-product is
CaCl2
177
At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.
independent of
178
Which of the following is a constituent of vinegar ?
Both (a) and (b)
Around 10% alcohol
Around 1% acetic acid
179
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).
180
Kopper-Totzek coal gasifier
can give ammonia synthesis gas (H2 + N2).
181
Addition of calcium oxide to water produces
all (a), (b) & (c)
exothermic heat
hissing sound
slaked lime
182
Sodium bisulphite is used for __________ water.
both (a) & (b)
deaeration
dechlorination
183
Riboflavin is a/an
vitamin
184
Flash point of most vegetable oils is about __________ °C.
200
185
Presence of sodium tripolyphosphate (an additive) in synthetic detergent
facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions).
186
.
Dense soda ash used in the manufacture of glass, is chemically represented by
Na2CO3.H2O
187
Reverse osmosis is normally used for the
desalination of brackish water to produce potable (drinking) water.
188
'Synthesis gas' meant for the synthesis of organic compound is a variable mixture of
CO & H2
189
Litharge is
lead oxide
190
Coagulant is used __________ filtration.
before
191
10% oleum comprises of 10% free
SO3
192
Use of chlorine in the treatment of sewage
helps in grease separation.
193
Removal of dirt/soil by soaps or detergent does not involve the __________ of soil.
precipitation
