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

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A

Increases from $+ 3$ to $+ 6$

B

Decreases from $+ 6$ to $+ 3$

C

Remains unchanged

D

Decreases from $+ 6$ to $+ 2$

Solution:

Decreases from $+ 6$ to $+ 3.$

Solution Image