1.

Yellow ammonium sulphide solution is a suitable reagent for the separation of:-

Answer»

HgS and PbS
PbS and `Bi_(2)S_(3)`
`Bi_(2)S_(3) and CuS`
`CdS and As_(2)S_(3)`

Solution :`Cd^(+2)` belongs to II A group while `As^(+3)` to II B. All The SULPHIDES of II B are soluble in yellow ammonium sulphide but those of II A are insoluble.


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