Which of the following statements is/are correct about the reaction.
`4CrO_(5)+6H_(2)SO_(4)to2Cr_(2)(SO_(4))_(3)+6H_(2)O+7O_(2)`

Options

A. It is disproportionation reaction.
B. It is a an intramolecular redox reaction.
C. Cr acts as an oxidant, whereas O acts as a reductant.
D. `CrO_(5)` acts as-oxidant and reductant both.

Answer

B, C, D

Explanation

Oxidation state of Cr in `CrO_(5)=+6`
It changes to `+3` in `Cr_(2)(SO_(4))_(3)`
`3e^(-)+Cr^(6+)toCr^(3+)` (reduction) (acts as oxidang)
Whereas O in `CrO_(5)` changes to`O_(2)`
`2O^(ɵ)toO_(2)+2e^(-)` (oxidation)(acts of reductant)
So, `CrO_(5)` acts as oxidant and reductant both. and also it is intramolecular redox reation since in `CrO_(5)`. Both Cr and O undergoes oxidation and reduction reaction.