This question concerns two salts, NaI and NaCl. Each of the two solid salts is added separately to warm concentrated $\text{H}_2\text{SO}_4$, and the observations are recorded. Aqueous solutions of the two salts are each mixed separately with $\text{AgNO}_3$(aq), after which concentrated $\text{NH}_3$(aq) is added, and the observations are recorded. Which row is correct?
- Asalt: NaCl; identity of one product formed with concentrated $\text{H}_2\text{SO}_4$: $\text{Cl}_2$; observation after $\text{AgNO}_3$(aq) and $\text{NH}_3$(aq): colourless solution
- Bsalt: NaCl; identity of one product formed with concentrated $\text{H}_2\text{SO}_4$: $\text{H}_2\text{S}$; observation after $\text{AgNO}_3$(aq) and $\text{NH}_3$(aq): white precipitate
- Csalt: NaI; identity of one product formed with concentrated $\text{H}_2\text{SO}_4$: $\text{H}_2\text{S}$; observation after $\text{AgNO}_3$(aq) and $\text{NH}_3$(aq): yellow precipitate
- Dsalt: NaI; identity of one product formed with concentrated $\text{H}_2\text{SO}_4$: $\text{I}_2$; observation after $\text{AgNO}_3$(aq) and $\text{NH}_3$(aq): colourless solution