When H(2)S gas is passed thorugh the HCl...

When `H_(2)S` gas is passed thorugh the HCl containing aqueous solution of `CuCl_2,HgCl_(2),BiCl_(3)` and `CoCl_(2)`, it does not precipitated out

`CuS`

`HgS`

`Bi_(2)S_(3)`

`CoS`

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The correct Answer is:

Cobalt sulphide does not ppt. out second group.

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