General Chemistry

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31 Tear gas used by the police to disperse the mob contains

A
Carbon dioxide
B
Chlorine
C
Ammonia
D
Hydrogen sulphide

32 The common name for the compound having formal NaOH is :

A
Caustic soda
B
Caustic potash
C
Soda ash
D
Sodium hydroxide

33 The Bhopal gas tragedy was caused by the gas

A
Methyl chloride
B
Methyl Iso Cyanide
C
Methyl Iso Cyanate
D
Methyl Cyanide

34 Slag is a name given for

A
molten iron
B
molten sand
C
molten alumina
D
molten calcium silicate

35 Tar roads get damaged if there is :

A
stagnation of water on road
B
heavy traffic
C
no maintenance
D
no sloping

36 The chemical name of rat poison is :

A
zinc oxide
B
potassium cyanide
C
lead nitrate
D
zinc phosphide

37 Which one of the following is used for dating very old objects of archaeological importance?

A
Phosphorus-31
B
Tritium
C
Radium
D
Carbon-14

38 The metal, used to galvanise iron to protect it from rusting is :

A
Zinc
B
Chromium
C
Lead
D
Antimony

39 The energy of the sun is mainly due to :

A
nuclear fission
B
radioactivity
C
heat
D
nuclear fusion

40 Quartz is a crystalline form of :

A
Alumina
B
Glass
C
Silica
D
Limestone

41 Gold dissolves in :

A
Hydrochloric acid
B
Nitric acid
C
Aqua-regia
D
Acetic acid

42 An example of major air pollutant is :

A
Oxygen
B
Carbon monoxide
C
Helium
D
Carbon dioxide

43 Gelatin is mostly used in making ice–creams in order to :

A
prevent making a colloid
B
stabilise the colloid and prevent crystallisation
C
stabilise mixture
D
enrich the aroma

44 The element used in the manufacture of safety matches is :

A
Phosphorous
B
Magnesium
C
Silicon
D
Sulphur

45 Hardest allotrope of carbon is :

A
diamond
B
graphite
C
coke
D
lamp black