Which of the following metals react with nitrogen at room
temperature to form nitride?

1 Sodium

2 Potassium

3 Magnesium

4 None of these

The process by which an organic compound breaks down into
simpler compounds on heating to high temperature is known as

1 Armatisation

2 Polymerization

3 Pyrolysis

4 Reduction

A mixture of salt and sand can be separated by

1 Sublimation

2 Dissolving in water

3 Gravity separation

4 Dry distillation

The pink color of Bayer’s reagent is discharged when
acetylene is passed through it. This is due to the formation of

1 Acetic acid

2 Ethylene

3 Water

4 Oxalic acid

Soda-acid fire extinguisher involves the reaction between

1 Sodium hydroxide and nitric acid

2 Sodium bi carbonate and sulphuric acid

3 Sodium sulphate and carbonic acid

4 Sodium carbonate and hydrochloric acid

Water gas is prepared by passing

1 Steam over white-hot coke

2 Air over red-hot coke

3 Methane over red-hot coke

4 Steam over heated sulphur

Chemical change does not take place in case of

1 Souring of milk into curd

2 Rusting of iron in atmosphere

3 Burning of magnesium ribbon in air

4 emitting of light by a red hot platinum wire

Which of the following metals can displace zinc from a
solution of zinc sulphate?

1 Lead

2 Magnesium

3 Iron

4 Mercury

The final products of combustion of ethane are

1 Carbon and oxygen

2 Ethylene and Hydrogen

3 Water and Carbon monoxide

4 Carbon dioxide and water

Superphosphate fertilizer is prepared by the reaction between

1 Calcium phosphate and Sulphuric hydroxide

2 Sodium phosphate and Sodium nitrate

3 Magnesium phosphate and Sodium nitrate

4 Sodium sulphate and Phosphoric acid

PVC is obtained by the polymerization of

1 Propene

2 Vinyl chloride

3 Styrene

4 Acetylene

Water is neither acidic nor alkaline because

1 It cannot accept or donate protons

2 It boils at a high temperature

3 It can dissociate into equal number of hydrogen ions

4 It cannot donate or accept electrons

Which of the following reactions is used for increasing the
number of carbon atoms in a chain?

1 Substitution reaction

2 Wurtz reaction

3 Friedel – Crafts reaction

4 Cannizzaro’s reaction

Which of the following substances undergoes chemical change
on heating?

1 Sodium chloride

2 Silica

3 Lead nitrate

4 Platinum wire

Which of the following gases is obtained by the reaction of
copper with dilute nitric acid is

1 NO2

2 N2O5

3 O2

4 NO