WAEC Chemistry 2012 Objective — Question 39

Question 39 of 50 from the West African Examinations Council (WAEC) Chemistry 2012 Objective paper, with the correct answer and a full explanation.

Which of the following metals is the least reactive?

A. Pb
B. Sn
C. Hg
D. AuCorrect

Explanation

Gold is the least reactive of the metals, according to the electrochemical series (K, Na, Ca, Mg, Al, Zn, Fe, Sn, Pb, H, Cu, Hg, Ag, Au — decreasing reactivity).

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