Out of `Cu^(2+),Ni^(2+),Co^(2+)` and `Mn^(2+)` those dissolved in dil. HCL only one gives a precipitate when` H_(2)S` is passed. Identify the corresponding one.

Options

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

Answer

B

Explanation

Di. HCI and `H_(2)S` are group II reagents. `Cu^(2+)` is a group II ion (in qualitative analysis). Hence the metal ion is `cu^(2+)`