Name the type of chemical process involved in the production of

(a) polythene from ethene

(b) ethene from kerosene fraction of petroleum.

(c) soap from vegetable oils

(d) margarine from vegetable oils

(a) Name the gas evolved when dilute hydrochloric acid is added to each of the following solids and the mixture is warmed

(i) sodium trioxocarbonate (IV);

(ii) potassium trioxosulphate (IV);

(iii) iron (II) sulphide.

(b) Name the reagent(s) that you would use to identify the gas in (a)(ii) above.

(a) The half-life of 56/25 Mn is 9.3 x 10\(^3\)S. What does the statement mean?

(b) Give the three types of radiation that are usually emitted by radioactive substances.

Consider the compounds represented as A and B below:

(a) What is the celationship between A and B? (

b) Name A and B.

(c) Will the chemical properties of A and B be the same? Give one reason for your answer.

(a) Name the components of

(i) producer gas; (ii) water gas;

(b) Give the reason why water is a better fuel than producer gas.