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

hydrogen

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sodium

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sulphur

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magnesium

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Solution

The correct option is B sulphur

Sulphur forms $S O_{3}$ and $S O_{2}$ which on dissolving in water give $H_{2} S O_{4}$ and $H_{2} S O_{3}$ solution which are acidic in nature. Oxides of non-metals are usually acidic in nature.

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