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

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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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Correct Answer - C
image
In this reaction chromium change from `+6` to `+3` oxidation state.
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