State what is observed when – Ammonium hydroxide is first added in a small quantity and then in excess to a solution of copper sulphate.

In the manufacture of ammonia:

(i) Name the process.

(ii) State the ratio of the reactants taken?

(iii) State the catalyst used.

(iv) Give the equation for the manufacture of the gas ammonia.

Give the equation for the reaction — ammonium chloride is heated with sodium hydroxide.

Name two gases which can be used to study the fountain experiment. State the common property demonstrated by the fountain experiment ?