(a) Define each of the following terms: I. biotechnology; II. biogas.

(ii) State two applications of biotechnology

(b) (i) Describe briefly the production of ethanol from sugar cane juice.

(ii) State the by-product of the process in (b)(i)

(iii) Mention two uses of the by-product.

(iv) Ethanol can be produced from both cane sugar and petroleum. Explain briefly why the ethanol from cane sugar is renewable but that from petroleum is non-renewable.

(c) Distinguish between heavy chemicals and fine chemicals. Give one example of each chemical.

(d) Arrange the following gases in increasing order of deviation from ideal gas behaviour: HCl; O\(_2\); Cl\(_2\). Give reason(s) for your answer.