A light green coloured salt soluble in water gives black percipitate on passing `H_(2)S` which dissolves readily in HCl. The metal ion present is :

Options

A. `Co^(2+)`
B. `Zn^(2+)`
C. `Ni^(2+)`
D. `Mn^(2+)`

Answer

C

Explanation

`Ni^(2+) + H_(2)S rarr underset(("Black ppt"))(NiS) overset(2HCl)rarr underset(("Soluble"))(NiCl_(2)) + H_(2)S`