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In acidic medium , H(2)O(2) acts as a re...

In acidic medium ,` H_(2)O_(2)` acts as a reducing agent in its reaction with `:`

A

`Cr_(2)(SO_(4))_(2)`

B

`Ag_(2)O`

C

`K_(5)[Fe(CN)_(6)]`

D

`K_(2)Cr_(3)O_(7)`

Text Solution

Verified by Experts

The correct Answer is:
A
In basic medium `H_(2)O_(2)` oxidises `Cr_(2)(SO_(4))_(2)`
`underset("Cr - Oxi. No. = +3")(2Cr^(3+)+10OH^(-)+3H_(2)O_(2))tounderset("Cr - Oxi. No. = +6")(2CrO_(4)^(2-)+8H_(2)O)`
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