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When SO(2) is passed through acidic solu...

When `SO_(2)` is passed through acidic solution of potassium dichromate, then chromium sulphate is formed. Change in valency of chronium is

A

`+4` to +2

B

`+5` to `+3`

C

`+6` to `+3`

D

`+7` to `+2`

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The correct Answer is:
C
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