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Quiz 4
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Q.1
Calcination of limestone is not done in a __________ kiln for producing lime.
Vertical shaft
Rotary
Fluidised bed
Fixed bed
Q.2
Free alkali in a toilet soap is __________ that in a laundary shop.
Less than
More than
Same
None of these
Q.3
__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.
Chlorine
Ammonium chloride
Sodium carbonate
Sodium bi-carbonate
Q.4
High temperature carbonisation of coal takes place at __________ °C.
2000
700
1100
< 500
Q.5
Fusion of bauxite and __________ produces high alumina cement.
Alum
Limestone
Coke
Quartz
Q.6
Fusion of limestone and __________ produces high alumina cement.
Sand
Bauxite
Quicklime
Calcite
Q.7
Type of glass used in optical work is the __________ glass.
Soda-lime
Fibre
Lead
Borosilicate
Q.8
The most economical pulp for the production of newsprint would be the __________ pulp.
Groundwood
Sulphate
Sulphite
Semichemical
Q.9
Soap cannot be used with hard water, because
Hard water contains sulphate
They form insoluble calcium soaps which precipitate
They attract back the removed dirt
None of these
Q.10
Which glass is usually used in optical work?
Lead glass
High silica (borosilicate) glass
Photo-sensitive glass
Fibre glass
Q.11
The purpose of adding Na₂CO₃ to water of low alkalinity is to
Permit the use of alum as a coagulant
Increase the softening capacity of zeolite
Facilitate easy regeneration of zeolite
All of the above
Q.12
Titanium dioxide is a/an __________ colour pigment.
White
Black
Yellow
Blue
Q.13
__________ is a thermosetting plastic.
Polyvinyl chloride
Polythene
Bakelite
Teflon
Q.14
Dense soda ash used in the manufacture of glass, is chemically represented by
Na₂CO₃
Na₂CO₃.10H₂O
Na₂CO₃.H₂O
Na₂HCO₃
Q.15
Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.
CaO
MnO₂
ZnO
FeS
Q.16
Which of the following coals has the highest calorific value?
Lignite
Sub-bituminous
Anthracite
Peat
Q.17
Bleaching action of bleaching powder is due to its __________ properties.
Reducing
Oxidising
Disinfecting
None of these
Q.18
Low temperature carbonisation of coal takes place at __________ °C.
300
1100
700
900
Q.19
Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.
25
60-70
150-200
250-300
Q.20
Chemical formula of 'salt cake' is
Na₂SO₄
CaSO₄
MgSO₄
BaSO₄
Q.21
Hydrazine is largely used
As a starting material for 'hypo'
In photographic industry
As rocket fuel
In printing industry
Q.22
Which of the following, when pyrolysed, produces perchloro-ethylene?
Ethylene dichloride
Chlorobenzene
Carbon tetrachloride
Chlorinated paraffin
Q.23
Naphthalene is removed from coke oven gas by
Adsorbing on palladium
Absorbing in ethanolamine
Scrubbing with wash oil
Passing it through electrostatic precipitator
Q.24
Solvay process as compared to dual process (i.e. modified Solvay process)
Can use low grade brine
Has less corrosion problems
Involves higher investment in NH₃ recovery units than that for crystallisation units for NH₄Cl
Both B and C
Q.25
RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically
Cyclo trimethylene trinitramine
Trinitro resorcinol
Cyclo tetramethylene tetranitramine
Trinitro benzene
Q.26
Dechlorination of treated water is necessary to
Remove residual turbidity
Reduce the bacterial load on filter
Control taste and odour
Remove chlorinous taste
Q.27
Iron ore hametite is concentrated using
Electro magnetic separation mainly
Gravity separation
Froth floatation
Roasting
Q.28
Hard water
Does not affect the lather formation by soap
Is not unfit for drinking purpose
Pollutes the water stream
All of the above
Q.29
Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?
High cost of mercury
High specific gravity of mercury
Non-availability of high purity mercury
Pollution of water stream by mercury
Q.30
Comparing sulphate process with sulphite process, we find that __________ in the later.
Both temperature & pressure in the former is less than that
Both temperature & pressure in the former is more than that
Temperature is more in the former whereas pressure is more
Pressure is more in the former whereas temperature is less
Q.31
Lime and soda ash are added to water to remove
Bicarbonates & sulphates of calcium and magnesium
Undersirable taste and odour
Bacteria
Its corrosiveness
Q.32
Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.
Endothermic
Exothermic
Irreversible
Both B and C
Q.33
Plasticisers are added to paints to
Make it corrosion resistant
Make glossy surface
Give elasticity & prevent cracking of the film
Increase atmospheric oxidation
Q.34
Hydrogenation of oil does not
Remove double bonds
Raise its melting point
Improve its resistance to oxidation
None of these
Q.35
Hydrolysis of sugar is called
Hydration
Inversion
Esterification
None of these
Q.36
Hydrophilic group of a soap or detergent solution is
Water hating
Soil loving
Water loving
None of these
Q.37
Deaeration of water in its treatment is necessary, as it
Minimises its turbidity
Helps in controlling its taste and odour
Minimises its corrosiveness
None of these
Q.38
Glycerine can be obtained from
Fat
Naphthalene
Cumene
Sucrose
Q.39
Glycerine is not used in the
Manufacture of explosive
Conditioning and humidification of tobacco
Manufacture of pharmaceuticals
None of these
Q.40
Chemical formula of BHC, which is an insecticide is
C₆H₆Cl₆
C₆Cl₆
C₆H₅Cl
C₆H₄Cl₂
Q.41
At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.
Independent of
Directly proportional to
Inversely proportional to
Proportional to the square of
Q.42
Which of the following is an explosive?
Nitroglycerene
Trintrotoluene (TNT)
Cellulose nitrate
All of the above
Q.43
Salt is added in the kettle during soap manufacture to separate
Soap from lye
Glycerine from lye
The metallic soap
The unsaponified fat from soap
Q.44
Thermosetting plastic materials
Can be repeatedly melted
Is useful for melt casting
Can not be melted after forming
Is useful for spinning
Q.45
Industrial production of chloroform requires acetone and
Phosgene
Calcium hypochlorite
Chlorine
Ammonium chloride
Q.46
Yellow phosphorus is transported under
Air
Water
Nitrogen
Helium
Q.47
Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H₂O = Fe₃O₄ + 4H₂, is not practised, as it is
A slow reaction
A discontinuous reaction (requiring regeneration of iron by water gas intermittently)
Still in development stage (by employing fluidised bed technique)
All of the above
Q.48
Haemoglobin is a/an
Amino acid
Biological catalyst
Protein
Enezyme
Q.49
Pick out the correct statement.
A fat is converted into oil by its hydrogenation
There is no difference between a fat and an oil so far as its physical properties are concerned
All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms
Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content
Q.50
Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene?
AgO
Al2O₃
ZnCl₂
FE₂O₃
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