Q.1
Calcination of limestone is not done in a __________ kiln for producing lime.
Q.2
Free alkali in a toilet soap is __________ that in a laundary shop.
Q.3
__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.
Q.4
High temperature carbonisation of coal takes place at __________ °C.
Q.5
Fusion of bauxite and __________ produces high alumina cement.
Q.6
Fusion of limestone and __________ produces high alumina cement.
Q.7
Type of glass used in optical work is the __________ glass.
Q.8
The most economical pulp for the production of newsprint would be the __________ pulp.
Q.9
Soap cannot be used with hard water, because
Q.10
Which glass is usually used in optical work?
Q.11
The purpose of adding Na₂CO₃ to water of low alkalinity is to
Q.12
Titanium dioxide is a/an __________ colour pigment.
Q.13
__________ is a thermosetting plastic.
Q.14
Dense soda ash used in the manufacture of glass, is chemically represented by
Q.15
Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.
Q.16
Which of the following coals has the highest calorific value?
Q.17
Bleaching action of bleaching powder is due to its __________ properties.
Q.18
Low temperature carbonisation of coal takes place at __________ °C.
Q.19
Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.
Q.20
Chemical formula of 'salt cake' is
Q.21
Hydrazine is largely used
Q.22
Which of the following, when pyrolysed, produces perchloro-ethylene?
Q.23
Naphthalene is removed from coke oven gas by
Q.24
Solvay process as compared to dual process (i.e. modified Solvay process)
Q.25
RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically
Q.26
Dechlorination of treated water is necessary to
Q.27
Iron ore hametite is concentrated using
Q.28
Hard water
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?
Q.30
Comparing sulphate process with sulphite process, we find that __________ in the later.
Q.31
Lime and soda ash are added to water to remove
Q.32
Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.
Q.33
Plasticisers are added to paints to
Q.34
Hydrogenation of oil does not
Q.35
Hydrolysis of sugar is called
Q.36
Hydrophilic group of a soap or detergent solution is
Q.37
Deaeration of water in its treatment is necessary, as it
Q.38
Glycerine can be obtained from
Q.39
Glycerine is not used in the
Q.40
Chemical formula of BHC, which is an insecticide is
Q.41
At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.
Q.42
Which of the following is an explosive?
Q.43
Salt is added in the kettle during soap manufacture to separate
Q.44
Thermosetting plastic materials
Q.45
Industrial production of chloroform requires acetone and
Q.46
Yellow phosphorus is transported under
Q.47
Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H₂O = Fe₃O₄ + 4H₂, is not practised, as it is
Q.48
Haemoglobin is a/an
Q.49
Pick out the correct statement.
Q.50
Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene?
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