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Question

Sulphur dioxide (SO2) is a/an:

A
acidic oxide
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B
basic oxide
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C
neutral oxide
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D
none of the above
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Solution

The correct option is C acidic oxide
Sulphur is a non-metal and all the non-metals form acidic oxides.
SO2 is the product of burning sulphur in the presence of oxygen.
When sulphur dioxide is dissolved in water sulphurous acid is formed, which turns blue litmus red.

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