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Chemistry

Chemistry
The substance which does not expand on going from liquid state to solid state is

Cast-iron
Type metal
Aluminium
Water

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Chemistry
The process of improving the quality of rubber by heating it with sulphur is called.

Sulphonation
Acceleration
Galvanization
Vulcanization

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Chemistry
The chemical formula of the laughing gas is

NO
NO2
N2O3
N2O

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Chemistry
The inert gases are ____ in water

insoluble
None of these
sparingly soluble
soluble

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Chemistry
Colloids can be purified by

Dialysis
Condensation
Condensation
Condensation

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Chemistry
In electro-refining, the pure metal is deposited on

Cathode
Electrolyte
Anode
Vessel

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