1.

X+HNO_(3) to Y+NO_(2)+H_(2)O+S, Y+Ammonium molybdatetoyellow ppt. identify X:

Answer»

`As_(2)S_(5)`
`Sb_(2)S_(5)`
`SnS_(2)`
`CdS`

Solution :`As_(2)S_(5)+HNO_(3) to H_(3)AsO_(4)+NO_(2)+H_(2)O+S` (aamonium molybdate)
`H_(3)AsO_(4)+(NH_(4))_(2)MoO_(4) to `YELLOW ppt. F `(NH_(4))_(2)AsO_(4)*12MoO_(3)`


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