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Acidified potassium dichromate is treate...

Acidified potassium dichromate is treated with hydrogen sulphide.In the reaction the oxidation number of chromium :

A

Increase from +3 to +6

B

Decreases from +6 to +3

C

Remains unchanged

D

Decreases from +6 to +2

Text Solution

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The correct Answer is:
B
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