Equation 1 and equation 2 illustrate two distinct reactions involving the halide ion $\mathrm{Q^-}$ and concentrated sulfuric acid. Equation 1: $\mathrm{H_2SO_4 + Q^- \rightarrow HSO_4^- + HQ}$ Equation 2: $\mathrm{H_2SO_4 + 2Q^- + 2H^+ \rightarrow SO_2 + Q_2 + 2H_2O}$ Identify Q.
- A$\mathrm{Cl^-}$ or $\mathrm{Br^-}$
- B$\mathrm{Br^-}$ or $\mathrm{I^-}$
- C$\mathrm{Cl^-}$ only
- D$\mathrm{I^-}$ only