When `H_2O_2` is added to ice cold solution of acidified potassium dichromate in ether and the contents are shaken and allowed to stand :

Options

A. a blue colour is obtained in ether due to formation of `Cr_(2),(SO_(4))_(3)`
B. a blue colour is obtained in ether due to formation of `CrO_(5)`
C. a blue colour is obtained in ether due to formation of `CrO_(3)`
D. chromyl chloride is formed

Answer

B

Explanation

`Cr_(2)O_(7)^(2-) + 2H^(+) + 4H_(2) O_(2) rarr underset("in ether")underset("Blue colour ")(2CrO_(5)+5H_(2)O)`