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Acidified K2Cr2O7 changes to green on re...

Acidified `K_2Cr_2O_7` changes to green on reactions with

A

`SO_2`

B

`FeSO_4`

C

Kl and then adding hypo

D

`NaCl + conc. H_2SO_4`

Text Solution

Verified by Experts

The correct Answer is:
A, B, C, D
`Cr_(2)O_(7)^(-2) + SO_(2) rarr underset("(green)")(Cr_2(SO_4)_3`
`Cr_2O_7^(-2) + Fe^(+2) rarr Cr^(+3) + Fe^(+3)`
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