Which of the following ions will give black ppt. with `H_2S` in an acidic solution ?

Options

A. `Cu^(2+)`
B. `Sn^(2+)`
C. `Pb^(2+)`
D. `Zn^(2+)`

Answer

B, C

Explanation

`Cu^(2+) and Pb^(2+)` give black ppt. with `H_2S` in acidic medium