Give balanced chemical equations for —

(i) Lab. preparation of ammonia using an ammonium salt.

(ii) Reaction of ammonia with excess chlorine.

(iii) Reaction of ammonia with sulphuric acid.

State one relevant observation for the following reaction — Burning of ammonia in air.

Write the balanced chemical equation for each of the following —

(i) Reaction of ammonia with heated copper oxide.

(ii) Laboratory preparation of ammonia from ammonium chloride.

Write balanced equations for :

(i) Action of warm water on AlN.

(ii) Excess of ammonia is treated with chlorine.

(iii) An equation to illustrate the reducing nature of ammonia.