Chemistry 9701 · AS & A Level · Electrochemistry

Electrochemistry — practice question

Bromine is obtained from sea-water. During the last part of the process, two redox reactions occur. $\text{Br}_2$(aq) $+\ \text{SO}_2$(g) $+\ \text{2H}_2\text{O}$(l) $\rightarrow\ \text{2HBr}$(aq) $+\ \text{H}_2\text{SO}_4$(aq) $\text{2HBr}$(aq) $+\ \text{Cl}_2$(g) $\rightarrow\ \text{Br}_2$(g) $+\ \text{2HCl}$(aq) Which row is the correct one?

  • A$\text{Br}_2$; $\text{SO}_2$; $\text{Cl}_2$
  • B$\text{Cl}_2$; $\text{Br}_2$; $\text{SO}_2$
  • C$\text{Cl}_2$; $\text{SO}_2$; $\text{Br}_2$
  • D$\text{SO}_2$; $\text{Br}_2$; $\text{Cl}_2$

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