An aqueous solution of a gas `(X)` gives the following reactions :  (a) It decolourises an
Channel: Doubtnut
Date: 26/07/2020

An aqueous solution of a gas `(X)` gives the following reactions :  (a) It decolourises an acidified `K_2 Cr_2 O_7` solution.  (b) On boiling with `H_2 O_2`, cooling it and then adding an aqueous solution of `BaCl_2`, a precipitate insoluble in `conc. HCl` is obtained.  (c) On passing `H_2 S` in the solution, white turbidity is obtained.  Identify `(X)` and give equations for steps `(a), (b)` and `(c)`.