(a)(i) What is the general formula for alkanoic acids?

(ii) State two chemical properties of ethanoic acid.

(b) Which of propene, butane and pentane

(i) will decolorize acidified KMnO\(_4\) solution?

(ii) can be easily polymerized?

(iii) is an isomer of methylpropane?

(iv) can be obtained from an alkanol by dehydration?

(a)(i) What is meant by the activation energy of a reaction?

(ii) State the effect of a catalyst on activation energy.

(b) What substance serves as a catalyst in each of the following?

(I) Hydrogenation of oils

(ii) Biochemical reactions.

(a) Write an equation for the reaction of chlorine with

(i) potassium iodide solution;

(ii) zinc on heating

(b) Identify the product Q in the following reaction: Cl\(_2\) + 2NaOH \(\to\) NaCl + H\(_2\)O + Q.

(a) List two uses of sodium trioxocarbonate (IV).

(b) Sodium trioxocarbonate (IV) solution is alkaline.

(i) What phenomenon is responsible for this observation?

(ii) Name the product obtained on passing carbon (IV) oxide into saturated sodium trioxocarbonate (IV) solution.

Xg of a pure sample of iron (II) sulphide reacted completely with excess dilute hydrochloric acid to give 3.20g of iron (II) chloride according to the following equation: FeS\(_{(s)}\) + 2HCI\(_{(aq)}\) ---> FeCl\(_{2(aq)}\) + H\(_2\)S\(_{(g)}\).

(a) Mention one method apart from heating by which the reaction can be made to proceed faster

(b) Calculate the value of X. [CI = 35.5, Fe = 56; FeS = 88g mol\(^{-1}\)]