When `H_(2)O_(2)` is shaken with an acidified solution of `K_(2)Cr_(2)O_(7)` in the presence of ether , the ethereal layer turns blue due to the formation of

Options

A. `Cr_(2)O_(3)`
B. `CrO_(4)^(2-)`
C. `Cr_(2)(SO_(4))_(3)`
D. `CrO_(5)`

Answer

D

Explanation

Acidified `K_(2)Cr_(2)O_(7)` solution reacts with hydrogen peroxide to give a deep blue solution due to the formation of peroxo compound `CrO_(5).`
`K_(2)Cr_(2)O_(7)+H_(2)SO_(4)+4H_(2)O_(2)rarr 2CrO_(5)+K_(2)SO_(4)+5H_(2)O`