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Chemistry WAEC Past Questions

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1531

 (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,

View Answer & Discuss (1) WAEC 1988
1532

(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

View Answer & Discuss WAEC 1988
1533

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.

View Answer & Discuss (1) WAEC 1988
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1534

(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

View Answer & Discuss WAEC 1988
1535

(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

View Answer & Discuss WAEC 1988
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