1.

`underset(("Black"))(X)overset(Dil.H_(2)SO_(4))tounderset(("gas"))(Y)overset(Dil.HNO_(3))to` Colloidal sulphur identify X?A. CuSB. FeSC. `As_(2)S_(3)`D. `CdS`

Answer» Correct Answer - B
`underset(("Black"))(FeS)overset(Dil.H_(2)SO_(4))toH_(2)Soverset(Dil.HNO_(3))tounderset("colloidal sulphur")(S)+NO_(2)+2H_(2)O`


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