Chemistry Past Questions and Answers

(a) How does the collision theory explain the rate of a chemical reaction?
(b) State how each of the following affects the rates of chemical reactions:
(i) surface area (ii) catalyst

(a) Write the ionic equation for the reaction between zinc powder and silver trioxonitrate (VI) solution
(b) Which substance in (a) above is (i) oxidized, (ii) reduced?
(c) State two applications of oxidation numbers

(a) What is a carbohydrate?
(b) Name two types of carbohydrates and give one example of each type

(a) Name the major raw materials used in the manufacture of the following:
(i) polythene
(ii) margarine
(iii) cement
(b) State one problem associated with oil producing areas

Distinguish between cracking and reforming. Of what importance are the two processes in the petroleum industry?