Chemistry 9701 · AS & A Level · Electrochemistry

Electrochemistry — practice question

X, Y and Z are three different halogens. The table presents the outcomes of nine experiments in which aqueous solutions of $\text{X}_2$, $\text{Y}_2$ and $\text{Z}_2$ were each added separately to aqueous solutions containing $\text{X}^-$, $\text{Y}^-$ and $\text{Z}^-$. Which row in the table below lists the ions $\text{X}^-$, $\text{Y}^-$ and $\text{Z}^-$ in descending order of reducing agent strength?

  • A$\text{X}^- \; > \; \text{Y}^- \; > \; \text{Z}^-$
  • B$\text{X}^- \; > \; \text{Z}^- \; > \; \text{Y}^-$
  • C$\text{Y}^- \; > \; \text{Z}^- \; > \; \text{X}^-$
  • D$\text{Z}^- \; > \; \text{X}^- \; > \; \text{Y}^-$

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI