A colourless mixture of two salts `(A)` and `(B)` (excess) is soluble in `H_(2) O. (A)` turns blue
Channel: Doubtnut
Date: 2020-07-26

A colourless mixture of two salts `(A)` and `(B)` (excess) is soluble in `H_(2) O. (A)` turns blue litmus red and `(B)` turns red litmus blue. `(A)` gives white precipitate with `(B)`, which dissolves in excess of `(B)` forming `( C).(A)` when placed in atmosphere gives fumes and can form dimer. `(A)` gives white precipitate with `NH_(4) Cl` and `NH_(4)OH` which is soluble in `(B)`. Identify `(A), (B)` and `(C)`. Explain reactions.