1989
What is discharged at the cathode during the electrolysis of copper (ll) tetraoxosulphate (VI) solution?
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1989 JAMB UTME Chemistry Past Questions
1989
The same current is passed for the same time through solutions of AgNO3 and CuSO4 connected in series. How much silver will be deposited if 1.0 g of copper is produced?[Cu = 63.5, S = 32, O = 16, Ag = 108, N = 14]
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1989
Bleaching powder, CaOCI2, H2O, deteriorates on exposure to air because
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1989
Which of the following reactions is (are) feasible? I Br (1) + 2CI 2(aq) 2Br (aq) + CI 2(g)Ll 21 (aq) + Br 2(1) 2Br (aq) + 1 2(s)Lll 2F (aq) + CI 2(g) 2CI (aq) + F 2(g) IV 2F (aq) + Br 2(1) 2Br (aq) + F 2(g)
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1989
Gunpower is made from charcoal, sulphur and potassium trioxonitrate (V) The salt in the mixture performs the function of
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1989
Some products of destructive distillation of coal are
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1989
The catalyst used in the contact process for the manufacture of tetraoxosulphate (VI) acid is
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1989
Which of the following is NOT involved in the extraction of metals from their ores?
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1989
Mortar is NOT used for under-water construction because
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1989
A metal is extracted from its ore by the electrolysis of its molten chloride and it displaces lead from lead (ll) trioxonitrate (V) solution. The metal is
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1989
The scale of a chemical balance is made of iron plate and coated with copper electrolytically because
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1989
The products of the thermal decomposition of ammonium trioxonitrate (V) are
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1989
The alkaline hydrolysis of fats and oils produces soap and
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1989
The bond which joins two ethanoic acid molecules in the liquid state is
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1989
The reaction between ethanoic acid and sodium hydroxide is an example of
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1989
Vulcanization of rubber is a process by which
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1989
When excess chlorine is mixed with ethene at room temperature, the product is
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1989
Three liquids X, Y and Z containing only hydrogen and carbon were burnt on a spoon. X and Y burnt with sooty flames while Z did not. Y is able to discharge the colour of bromine water whereas X and Z cannot. Which of the…
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1989
The gas responsible for most of the fatal explosions in coal mines is
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1989
It can be deduced from the vapour pressure curves above that
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