What is the function of sulphur (IV) oxide in the reaction represented by the following equation? SO 2(aq) + 2H2S(g) → 3S (s) + 2H 2O (l)
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1998
Which of the following methods is suitable for the preparation of an insoluble salt?
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1998
Which of the following is not a property of trioxonitrate (V) salts?
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1998
The spontaneity of a chemical reaction is determined by the change in the
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1998
Which of the following can be added to dissolve the precipitate formed in the reaction represented by the following equation? CaCl2(aq) + H2C2O 4(s) ⇌ CaC 2O2
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1998
Pipe-borne water is usually chlorinated in order to
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1998
Substances which absorb water from the atmosphere without dissolving in it are sid to be
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1998
How many electrons are removed from Cr2- when it is oxidized to CrO42-?
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1998
A device used in the laboratory for intermittent production of gases without heating is
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1998
Metals are said to be malleable because they
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1998
Aluminium is extracted from
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1998
Rusting of iron is an example of
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1998
Two metallic ions commonly present in hard water are
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1998
Dehydration of ethanol produces
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1998
Petrol consists mainly of
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1998
Which of the following alkanes has the highest boiling point?
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1998
The liquid product of the destructive distillation of coal is
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1998
Which of the following can undergo both addition reactions and substitution reactions?
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1998
Which of the following compounds is used as a gaseous fuel?
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1998
A positive reaction to Fehling's test indicates the presence of