Nitrogen gas can be obtained by heating

1. Ammonium nitrate
2. Ammonium nitrite
3. Magnesium nitride
4. Ammonium chloride

Which of the following is not a typical property of an ionic compound?

1. High melting point.
2. Conducts electricity in the molten and in the aqueous solution state.
3. They are insoluble in water.
4. They exist as oppositely charged ions even in the solid state.

Give one word or phrase for the following statements :

(i) A bond formed by a shared pair of electrons with both electrons coming from the same atom.

(ii) A salt formed by incomplete neutralisation of an acid by a base.

(iii) A reaction in which hydrogen of an alkane is replaced by a halogen.

(iv) A definite number of water molecules bound to some salts.

(v) The process in which ammonia is converted to nitric oxide.

Write a balanced chemical equation for each of the following

(i) Action of ammonia with excess of chlorine.

(ii) Ammonia burns in oxygen.

(iii) Sulphur reacts with conc. nitric acid.

(iv) Calcium hydrogen carbonate with HCl.

(v) Carbon with conc. H₂SO₄.