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
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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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