1988 WAEC SSCE Chemistry Past Questions

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1988

Aqueous solutions of zinc chloride, calcium chloride iron (lII) tetraoxosulphate (VI) and lead (II) trioxonitrate (IV) are contained in four separate bottles whose labels have been lost. Using aqueous ammonia solution on…

1988

Carry out the following exercises on sample C. Record your observations and identify any gases evolved. State the conclusion you draw from the result of each test.(a) Put about half of sample C into a conical flask and a…

1988

A solution of a mineral acid containing 0.10 mol of the acid per dm of solution. B IS a solution Containing 1.325g of anhydrous sodium trioxocarbonate (IV) per dm of solution.(a) Put A into the burette and titrate with 2…

1988

(a) An element X is represented as \(^{40}_{20} X\)(i) How many electrons and how many neutrons are present in the atom of X?(ii) Write the electronic configuration of the atom(b) Chlorine, whose atomic number is 17, rea…

1988

(a) Write the structural formula of:(i) 2, 2, 4 - trimethylpentane, (ii) ethylmethanoate, (iii) trans 2, 3 - dimethylbut - 2-ene.(b) Write the structure of the straight-chain compound that is isomeric with 2,2,4 - trimet…

1988

(a) Explain why transition metals(i) have high melting points(ii) have variable oxidation states,(iii) exhibit paramagnetism(b) (i) Name the impurities present in bauxite(ii) State how the impurities in bauxite are remov…

1988

(a) Explain with equation where appropriate, the functions of the following substances in the Solvay Process:(i) limestone,(ii) ammonia,(iii) brine.(b) Explain why the reaction between aqueous sodium trioxocarbonate (IV)…

1988

State Gay-Lussac's law and illustrate the law with one chemical reaction.

1988

Distinguish between cracking and reforming. Of what importance are the two processes in the petroleum industry?

1988

(a) Name the major raw materials used in the manufacture of the following:(i) polythene(ii) margarine(iii) cement(b) State one problem associated with oil producing areas

1988

(a) What is a carbohydrate?(b) Name two types of carbohydrates and give one example of each type

1988

(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

1988

(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

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 re…

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

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 C\(_2\)H\(_4\)Cl\(_2\),

1988

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

1988

The reaction represented by the equation NaOH(aq) + HCI(aq) → NaCI(aq) + H2O(/)

1988

The following are uses of sulphur except

1988

An acid present in proteins is

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