1990
Which of the following reaction will not take place under normal conditions?
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1990 WAEC SSCE Chemistry Past Questions
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1990
Catalytic hydrogenation of oils results in the production of
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1990
A catayst which increases the rate of a chemical reaction does so by
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1990
Which of the following reactions does not occur in the blast furnace during the extraction of iron?
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1990
Which of the following compounds will undergo additional reactions?
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1990
When a solid melts and consequently boils, there is
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1990
Aluminum is above iron in the electrochemical series, yet iron corrodes easily on exposure to air while aluminium does not. This is because aluminium
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1990
The compound of copper which is used in electroplating dyeing, printing, wood preservation and as a fungicide is
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1990
Which of the following salts in aqueous solution will have a pH greater than 7?
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1990
The gas that is liberated when iron is heated with concentrated tetraoxosulphate (VI)acid is
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1990
Which of the following correctly explains entropy?
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1990
How many molecules are there in 14g of nitrogen gas at s.t.p? (n = 14, Avogadro Number = 6. 0 x 1023 mol-1)
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1990
Which of the following equations represents the reaction leading to the removal of permanent hardness of water?
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1990
In the reaction represented by the equation; 2FeCI3 + SO2 + 2H2O → 2FeCL2 + H2SO4 + 2HCI the oxidation number of sulphur changes from
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1990
Which of the following pollutants is biodegradable ?
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1990
MO and X 2O represent the formula of oxides of elements M and X respectively . If M and X should combine to form a separate compound, what would be the formula of the compound?
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1990
What is the molecular formula of a compound whose empirical formula is CH2O and molar mass is 180? (H = 1, C = 12, O = 16)
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1990
To what temperature must a gas be raised from 273K in order to double both its volume and pressure?““
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1990
Which of the following is not correct of glucose and fructose?They
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1990
Which of the following statements explains why tetraoxosulphate (IV) acid is reqarded as a strong acid?
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