An aqueous solution of compound `'A'` gives white precipitate with `2M HCl`.The precipitate
Channel: Doubtnut
Date: 2020-04-19

An aqueous solution of compound `'A'` gives white precipitate with `2M HCl`.The precipitate becomes black on addition of aqueous `NH_(3)` due to formation of `'B'`.`'B'` dissolves in aquaregia. `'A'` and `'B'` are: