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In the alkaline medium, the colour of po...

In the alkaline medium, the colour of potassium dichromate solution changes from orange to yellow due to the formation of potassium chromate. What is the change in oxidation state of chromium?

A

1

B

2

C

3

D

0

Text Solution

Verified by Experts

The correct Answer is:
D
`underset("Potassium dichromate")(K_2 overset(+6)(Cr_2) O_7) underset("medium")overset("Alkaline")(rarr)underset("Potassium chromate")(K_2 overset(+6)(Cr)O_4)`.No change in the oxidation state of chromium takes place.
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