(a) Write a balanced chemical equation for each of the following reactions:

(i) ammonia gas with copper(II) oxide;

(ii) ammonia gas with oxygen gas;

(iii) aqueous potassium iodide with chlorine gas;

(iv) iron with dilute tetraoxosulphate (VI) acid;

(v) aqueous lead(II) trioxonitrate (V) with hydrogen chloride gas.

b(i) Describe briefly the process involved in the extraction of tin from tin ore.

(ii) Mention three uses of hydrogen.

(iii) State two physical properties of hydrogen.

(c) State the class of oxide to which each of the following compounds belong:

(i) Na\(_2\)O;  (ii) ZnO; (iii)SO\(_2\); (iv) CO\(_2\); (v) N\(_2\)O.