Chemistry - Salt Analysis Question with Solution | TestHub

Na₂SO₄ + C $\stackrel{\Delta }{\to }$ Na₂S

So gas/species A is related to the sulfide ion ${\mathrm{S}}^{2-}$, which gives a purple color with sodium nitroprusside and a yellow precipitate with $Cd{\left(N{O}_3\right)}_2$

Now check statements:

False — Sulfide reacts with sodium nitroprusside in a basic medium, giving a purple colour.

True — ${\mathrm{H}}_2\mathrm{S}$ is identified by lead acetate paper (black $Pb\mathrm{S}$).

True — ${\mathrm{H}}_2\mathrm{S}$gives a white precipitate with $BaC{l}_2$due to sulfur formation.

True — ${\mathrm{H}}_2\mathrm{S}+S{O}_2\to S$ (yellow turbidity).

False — $N{a}_2{\mathrm{SO}}_3+Zn+NaOH$ does not produce ${\mathrm{H}}_2\mathrm{S}$

Hence, total correct statements: