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Question

Sulfur dioxide can be anhydride for which of the following?

A
Sulfurous acid
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B
Hyposulfurous acid
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C
Sulfuric acid
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D
Hydrosulfuric acid
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Solution

The correct option is A Sulfurous acid
Sulphur dioxide SO2 can be anhydride of sulfurous acid H2SO3.
Sulfurous acid is prepared by dissolving sulphur dioxide in water.
SO2+H2OH2SO3

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