On reaction with dil. H(2)SO(4) which of...

On reaction with dil. `H_(2)SO_(4)` which of the following salts will give out a gas that turns an acidified dichromate paper green?

`Na_(2)CO_(3)`

`Na_(2)S`

`ZnSO_(3)`

FeS

Text Solution

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The correct Answer is:

B, C, D

`Na_(2)S+H_(2)SO_(4) to Na_(2)SO_(4)+H_(2)S uarr`, `ZnSO_(3)+H_(2)SO_(4) to ZnSO_(4)+H_(2)O+SO_(2) uarr`
`FeS+H_(2)SO_(4) to FeSO_(4)+H_(2)S uarr`
`H_(2)S` and `SO_(2)` can reduce dichromate paper to green `Cr^(3+)`

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