Write a balanced chemical equation for each of the following:

(i) Reaction of excess ammonia with chlorine.

(ii) Reaction of lead nitrate solution with ammonium hydroxide.

Distinguish between the following pairs of compounds using a reagent as a chemical test.

Ammonium sulphate crystals and sodium sulphate crystals

State why nitrogenous matter produces ammonia. State a liquid source of ammonia.

Give the word equation and balanced molecular equation for the laboratory preparation of ammonia from NH₄Cl and calcium hydroxide.