Ordinary level 2026 west regional mock chemistry 2

2. This question concerns the compounds

A: $\text{C}_4\text{H}_{10}$      B: $\text{C}_2\text{H}_5\text{OH}$      C: $\text{C}_2\text{H}_4$      D: $\text{CH}_3\text{COOH}$

a) Complete the table below.

(2mks)

b) Select a compound from A to D which is:

(i) Used to induce ripening in fruits …………………………………………………………………………1mk

(ii) A major component of cooking gas in Cameroon ………………………………………………….1mk

c) Compound B and D reacts in the presence of conc. $\text{H}_2\text{SO}_4$ to produce a fruity smelling oily liquid.

(i) What name is given to this type of reaction …………………………………………………………..1mk

(ii) Give the chemical name of the oily liquid …………………………………………………………….1mk

(iii) Write a balance chemical equation for the reaction taking place between compound B and D ………………………………………………………………………………………………………………………..1mk

d) Show by equation how compound C can be converted to a member of compound A.

i) Reagent……………………………………………………………………………………………………………

ii) Reaction condition…………………………………………………………………………………………….

iii) Equation………………………………………………………………………………………………………….

(3mks)

Total = 10 marks

3. Consider the reaction below for the manufacture ammonia by the Haber process:

a) Explain the meaning of $\Delta\text{H} = -92.4\text{ kJ/mol}$.

……………………………………………………………………………………………………………………………1mk

b) State the sources of the raw materials used in the industrial manufacture of ammonia.

Nitrogen:……………………………………………………………………………………………………………….1mk

Hydrogen:……………………………………………………………………………………………………………..1mk

c) State any two reaction conditions required for an optimum yield of ammonia in this process?

……………………………………………………………………………………………………………………………1mk

d) What will be the effect on the yield of ammonia if

(i) The pressure is decreased? ……………………………………………………………………………..1mk

(ii) The temperature is increased? ………………………………………………………………………..1mk

e) i) What principle governs your reasoning in (d) above?

……………………………………………………………………………………………………………………………1mk