Waec Chemistry Past Questions and Answers

Question 41:

• WAEC 1988

During the electrolysis of dilute tetraoxosulphate (VI) acid solution 0.05 mole of electrons were passed what volume of gas was produced at the anode? (Gaseous molar volume = 22. 4dm³ at s.t.p)

A. 0.224 dm³
B. 0.280 dm³
C. 0.560 dm³
D. 2.24 dm³
E. 22.4 dm³

Question 42:

• WAEC 1988

(a) Name two allotropes of carbon
(b) Name two products of the destructive distillation of coal and state one use of each.

Question 43:

• WAEC 1988

(a) Give one example of;
(i) heavy chemicals
(ii) fine chemicals
(b) Write the structural formulae and the names of compounds having the formula CH\(_4\)CI,

Question 44:

• WAEC 1988

(a) Arrange the following in their correct order of increasing energy: alpha particles, gamma rays and beta particles
(b) State one difference between nuclear fission and nuclear fusion

Question 45:

• WAEC 1988

50cm\(^{3}\) of sulphur (IV) oxide were produced at s.t.p. when some quantity of powdered sulphur were burnt in excess oxygen
(a) Write the equation for the reaction
(b) Calculate the volume of oxygen used up during the reaction
(c) Which of the gas laws is applicable? State the law.