To a solution of a substance, gradual addition of ammonium hydroxide results in a brownish
Channel: Doubtnut
Date: 2020-04-19

To a solution of a substance, gradual addition of ammonium hydroxide results in a brownish black precipitate which does not dissolve in excess of `NH_(4)OH`.However, when `Kl` (not in excess) is added to the original solution, a green precipitate is formed. The solution contained :