A white substance (A) reacts with dilute `H_(2)SO_(4)` to produce a colourless suffocating
Channel: Doubtnut
Date: 2020-04-05

A white substance (A) reacts with dilute `H_(2)SO_(4)` to produce a colourless suffocating gas (B) and a colourless solution (C )/ The reaction of gas (B) with potassium iodate and starch solution produce a blue colour solution. Aqueous Solution of (A) gives a white precipitate with `BaCl_(2)` solution which is soluble in dilute `HCl`. Addition of aqueous `NH_(3)` or `NaOH` to (C ) produced first a precipitate which dissolves in excess of the respective reagent to poduced a clear solution. Similarly addition of excess of potassium ferrocyanide to (C ) produced a precipitate (D) which also dissolves in aqeous `NaOH` giving a clear solution. Identify (A),(B),(C ) and (D ). Write the equation of the reactions involved.