1.

A light green salt soluble in water gives blackprecipitate onpassing H_(2)S which dissolves readily in HCI .The metalion present is

Answer»

`Co^(2+)`
`Fe^(2+)`
`NI^(2+)`
`Ag^(o+)`

SOLUTION :`FES` issoluble in HCI, Also `Fe^(2+)` salts are GREEN


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