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When an article is bleached by SO(2) it ...

When an article is bleached by `SO_(2)` it loses its colour. The colour can be restored by :

A

drying

B

heating

C

exposure to air

D

cannot be restored by any of these methods

Text Solution

Verified by Experts

The correct Answer is:
C
`SO_2` bleaches the colour by reduction and on exposure to air, colour is restored due to oxidation.
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