2002 WAEC SSCE Chemistry Past Questions

2002

(a) Suggest how the following liquid reagents can be suitably stored in the laboratory (i) X which fumes in moist air; (ii) Y which is slowly decomposed by sunlight in ordinary reagent bottles.(b) State what is observed…

2002

Credit will be given for strict adherence to the instructions, for observations precisely recorded and for accurate inferences. All tests, observations, and inferences must be clearly entered in your answer book, in ink,…

2002

All your burette readings (initial and final), as well as the size of your pipette, must be recorded but no account or expeimental procedure is required. All calculations must be done in your answer book.A is 0.125 mol d…

2002

a)(i) Give two uses of ammonia.(ii) Name the process by which ammoniacal liquor can be obtained from coal and list two other products of the reaction(iii) What type of reaction is involved in the conversion of ammoniacal…

2002

(a)(i) State three methods of preparing salts, giving one example in each case of a salt so prepared.(ii) What type of salt is each of the following? NaH\(_2\)PO\(_4\); (CH\(_3\)COO)\(_2\)Pb; KAI(SO\(_4\))\(_2\). 12H\(_2…

2002

(a) Explain in terms of the kinetic theory why a tyre should not be overinflated.(b)The following results were obtained at room temperature in an experiment to verify one of the gas laws using a glass syringe:Pressure (P…

2002

(a) What term is used to describe each of the following processes?(i) Alkaline hydrolysis of fats and oils;(ii) The conversion of glucose into ethanol by enzymatic action;(iii) Thermal decomposition of higher petroleum f…

2002

(a) Giving different examples, mention one metal in each case which produces hydrogen on reacting with(i) dilute mineral acid(ii) cold water;(iii) steam;(iv) hot, concentrated alkali.(b) In an experiment, excess 0.50 mol…

2002

(a) What is the shape of (i) p - orbital; (ii) a molecule of methane; (iii) a molecule of carbon (IV) oxide?(b) Consider the following elements: Ne, S, CI, 0, Fe, Mg. State which of them(i) exhibit(s) allotropy;(ii) form…

2002

The atomic number of chlorine is 17. What is the number of electrons in a chloride ion?

2002

Which of the following processes takes place during the production of margarine from vegetable oils?

2002

When concentrated sodium chloride solution is electrolysed using inert electrodes the products are

2002

Consider the following equation; Cr2O7(aq)2- + 14H+(aq) + 6e- → 2Cr3+(aq) + 7H2O(I). The oxidation number of chromium changes from

2002

Which of the following statements about soapless detergents is correct? They

2002

The following compounds are hydrocarbons except

2002

When alkynes are hydrogenated completely, they produce compounds with the general molecular formula

2002

Which of the following acids from normal salt only?

2002

If the relative molecular mass of an element is not a whole number, it can be deduced that the element is

2002

An element Y has the electronic configuration 1s22s22p6623p4. To what period does it belong in the periodic table?

2002

Which of the following elements has a ground state electronic configuration with an incomplete penultimate shell?

1 2