Chemistry · May / June 2017 · Paper 12 · Question 26

The results of experiments involving four metals, W, X, Y and Z, and their ions are shown. Y(s) + Z⁺(aq) → Y⁺(aq) + Z(s) W(s) + X⁺(aq) → no reaction Z(s) + X⁺(aq) → Z⁺(aq) + X(s) What is the order of reactivity of the four metals, most reactive to least reactive?

1. AW → X → Y → Z
2. BX → W → Z → Y
3. CY → Z → X → W
4. DZ → Y → W → X

As printed in the paper