(a)(i) Explain briefly the term chemical industry.

(ii) State three factors that should be considered in siting a chemical industry.

(b)(i) Describe briefly twin is extracted from its ore.

(ii) Give two uses of tin.

(c)(i) Name the constituents of cement.

(ii) How does mortar set?

(d)(i) Explain briefly the term pollution.

(ii) Give two examples of air pollutants.

(e) Consider the following reversible reaction which occurred at the temperature of 298K:

N\(_{2(g)}\) + 3H\(_{2(g)}\) \(\rightleftharpoons\) 2NH\(_{3(g)}\); \(\bigtriangleup\)H = —92.37kJ