Powder P is a mixture of two substances chosen from $\text{AgCl}$, $\text{AgBr}$ and $\text{AgI}$. P is shaken with dilute aqueous ammonia. A yellow solid, Q, is left behind. The mixture is then filtered, and Q is rinsed and dried. The filtrate is gathered and added to aqueous nitric acid to form a white precipitate, R, which is filtered off, washed and dried. Q and R are each warmed separately with concentrated sulfuric acid, $\text{H}_2\text{SO}_4$. Which observations are made?
- AQ + concentrated $\text{H}_2\text{SO}_4$: violet fumes; R + concentrated $\text{H}_2\text{SO}_4$: orange fumes
- BQ + concentrated $\text{H}_2\text{SO}_4$: violet fumes; R + concentrated $\text{H}_2\text{SO}_4$: steamy fumes
- CQ + concentrated $\text{H}_2\text{SO}_4$: steamy fumes; R + concentrated $\text{H}_2\text{SO}_4$: violet fumes
- DQ + concentrated $\text{H}_2\text{SO}_4$: orange fumes; R + concentrated $\text{H}_2\text{SO}_4$: steamy fumes