2003 WAEC SSCE Chemistry Past Questions

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2003

State what you would see on;(i) bubbling SO\(_2\) into acidified KMnO\(_4\) solution(ii) mixing zinc dust with CuSO\(_4\) solution(iii) adding concentrated HNO\(_3\) to freshly prepared FeSO\(_4\) solution.(b) List two s…

2003

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

2003

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

2003

(a) State the role of each of the following substances in the treatment of river water for town supply (i) Sand bed. (ii) Alum (iii) Chlorine(b)(i) Give three major uses of H\(_2\)SO\(_4\)(ii) Explain the following obser…

2003

(a) Mention one oxide in each case, which(i) used in bleaching(ii) is a redish-brown gas(iii) reacts with NaOH and also with HCI;(iv) dissolves in water to give a solution with pH greater than 7;(v) oxidizes hot, concent…

2003

(a)Give two reasons why aluminium is preferred to copper for making overhead electric cables.(ii) Describe briefly the electrolytic extraction of aluminium from purified bauxite.(b) The diagram below represents an electr…

2003

(a) i) An organic compound X contains 40% carbon, 6.67% hydrogen, the rest being oxygen. If X has a relative molecular mass of 60, determine its(i) empirical formula (ii) molecular formula. [H = 1 ; C = 12; O = 16](b) An…

2003

(a) (i) State three characteristic properties of transition metals.(ii) What is the oxidation state of manganese In each of the following species? (1) MnCl\(_2\) (II) MnO\(_2\) (III) MnO\(_4^{-}\)(iii) Explain why mangan…

2003

(a) The electronic configuration of five elements represented by the letters P, Q, R, S and T are indicated below.P - 1s\(_2\)2s\(_2\)2p\(_2\)Q 1s\(_2\)2s\(_2\)2p\(_4\)R 1s\(_2\)2s\(_2\)2p\(_6\)S - 1s\(_2\)2s\(_2\)2p\(_6…

2003

The electronic configuration of an element is 1s 22s22p63s 23p3. Where is the element located in the periodic table?

2003

Which of the following acids is dibasic?

2003

Which of the following quantities is the same for one mole of Br2(l) and one mole of He(g)?

2003

Which of the following statements about dative bonding is not correct?

2003

An element X with electronic configuration 1s22s22p 63s 23p5combines with another element Y with the configuration 1s2s22p23s33p5. What is the formula of the compound formed?

2003

Group O of elements are unreactive because

2003

What term is used to describe an oxide whose aqueous solution turns blue litmus red?

2003

Substance Q reacts with cold water to form a solution which turns red litmus blue. Substance Q could be

2003

Which of the following solutions will give a precipitate with dilute tetraoxosulphate (VI) acid? l. Lead (ll) trioxonitrate (V) solution ll. Barium chloride solution lll. Sodium chloride solution

2003

Which of the following salts can be prepared by reacting the metal with dilute H2SO4?

2003

Bees inject an acidic substance when they sting. Which of the following chemical could be used to treat bee stings?

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