SCIENCE
Paper 2 (Chemistry) - 2002
(One hour and a half)

Question 3
In order to obtain 1 tonne of aluminium, the following inputs are required: 4 tonnes of bauxite, 150 kg. of sodium hydroxide and 600 kg. of graphite. The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (III) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.

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Question 1(a) Answer the following.Question 1(b) Answer the following.Question 1(c) Complete the table.Question 1(d) Complete the table.Question1(e) Answer the follwing.Question 1(f) Answer the following.Question 1(g) Answer the follwing.Question 1(h) Write balanced equations.Question 2(a) Answer the following.Question 2(b) Complete the table.Question 3(a) Answer the following.Question 3(b) Answer the following.Question 3(c) Answer the following.Question 3(d) Answer the following.Question 4(a) Answer the following.Question 4(b) Answer the following.Question 4(c) Answer the following.Question 5 Answer the following.Question 6 Answer the following.Question 7(a) Name a compound.Question 7(b) Write balanced equations. : Fill in the blanks

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35. (a) When bauxite is treated with sodium hydroxide solution what happens to: (i) The aluminium oxide?   36. (ii) The Iron (III) oxide?

 
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