(a)(i) Define polymerization.

(ii) Mention two types of polymerization.

(iii) Give one example of I. naturally occurring polymer, II. synthetic polymer.

(b)(i) Describe how ethyne could be prepared in the laboratory.

(ii) Write an equation for the I. polymerization of ethyne II. complete reaction of ethyne with hydrogen bromide.

(iii) Name each of the products formed in (b)(ii) II.

(c)(i) Define each of the following terms: I. pollution; Il. pollutant.

(ii) Mention three types of pollution.

(iii) Give two ways by which pollution can be prevented.