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Question

Which of the following element forms a gaseous oxide? which on dissolving in water gives an acidic solution.

A
hydrogen
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B
sodium
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C
sulphur
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D
magnesium
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Solution

The correct option is B sulphur

Sulphur forms SO3 and SO2 which on dissolving in water give H2SO4 and H2SO3 solution which are acidic in nature. Oxides of non-metals are usually acidic in nature.

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