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Chemistry

Chemistry
The chief source of naphthalene is

Coal-tar
Camphor
Charcoal
Diesel

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Chemistry
Smoke is formed due to

Solid dispresed in liquid
Gas dispresed in solid
Gas dispersed in gas
Solid dispersed in gas

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Chemistry
Which of the following is used to make light weight, but strong plastic ?

Polythene
Methyl Methacrylate
Polyvinyl Chloride
Nylon

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

Type metal
Aluminium
Water
Cast-iron

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Chemistry
Water can be separated from alcohol water mixture by

Decantation
Sublimation
Distillation
Evaporation

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Chemistry
Combustion of a candle is a/an

Physical change
Exothermic reaction
Endothermic reaction
Photochemical reaction

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