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Fe(OH)(3) and Cr(OH)(3) precipitates can...

`Fe(OH)_(3)` and `Cr(OH)_(3)` precipitates can be completely separated by `:`

A

Aqueous `NH_3`(cold )

B

HCl

C

`NaOH//H_2O_2`

D

`H_2SO_4`

Text Solution

Verified by Experts

The correct Answer is:
C
`Cr(OH)_3+OH^(-)hArr [Cr(OH)_4]^(-)`
`2[Cr(OH)_4]^(-)+2OH^(-)+3H_2O_2 to 2CrO_4^(2-)` (yellow colour solution)+`8H_2O`
`Fe(OH)_3` remains as brown precipitate.
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