1.

Which of the following an reaction with H_(2)S will produce metal sulphide?

Answer»

`COCl_(2)`
`CuCl_(2)`
`[Cd(CN)_(4)]^(2-)`
`[Zn(OH)_(4)]^(2-)`

SOLUTION :B. `CuCl_(2)+H_(2)StoCuS+2HCl`
C. `[Cd(CN)_(4)]^(2-)+H_(2)StoCdS+2H_(+)+4CN^(-)`
D. `(Zn(OH)_(4)]^(2-)+H_(2)StoZnS+2OH^(-)+2H_(2)O`


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