A white powder (A) on heating gave a non-combustible gas and a residue (B). The white
Channel: Doubtnut
Date: 2020-04-12

A white powder (A) on heating gave a non-combustible gas and a residue (B). The white compound A on reaction with `H_(2)S` in alkaline medium forms a precipitate (C ) which dissolves in dil. `CH_(3)COOH`. (B) can be disssolved in dil HCl to prepare a solution which gives a white precipitate with `K_(4)[Fe(CN)_(6)]`.   Compound A is