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When hydrogen peroxide is added to acidi...

When hydrogen peroxide is added to acidified potassium dichromate, a blue colour is produced due to formation of

A

`a) CrO_(3)`

B

`b) Cr_(2)O_(3)`

C

`c) CrO_(5)`

D

`d) CrO_(4)^(2-)`

Text Solution

Verified by Experts

The correct Answer is:
C
Acidified potassium dichromate is oxidised to unstable blue chromium peroxide, which is soluble in ether and produces blue coloured solution.
`K_(2)Cr_(2)O_(7)+H_(2)SO_(4)+4H_(2)O_(2)rarrunderset("blue colour")(2CrO_(5))+K_(2)SO_(4)+5H_(2)O`
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