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Q. Precipitate (Q) was treated withdil. ...


Q. Precipitate (Q) was treated withdil. HCl and coloured solution was obtained. On passing `H_(2)S` gas into this solution no precipitate was obtained but colour of the solution changes, then cation present in the precipitate (Q) can be identified by:

A

`Na_(2)S_(2)O_(3)` solution

B

`KI+`Starch

C

`K_(4)[Fe(CN)_(6)]`

D

All

Text Solution

Verified by Experts

The correct Answer is:
D
`Fe(OH)_(3)` (Q) undergo redox reaction with `Na_(2)S_(2)O_(3)` solution, SI+Starch, `K_(4)[Fe(CN)_(6)]` showing chainge in colour.
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