WAEC Chemistry 2019 Objective — Question 35

Question 35 of 50 from the West African Examinations Council (WAEC) Chemistry 2019 Objective paper, with the correct answer and a full explanation.

If the oxidation potential of Mg and Al are +2.37 volts and +1.66 volts respectively, then Mg would not

A. replace Al
B. be replaced by AlCorrect
C. remain in the solution
D. replace Al

Explanation

Since Mg has a higher (more positive) oxidation potential than Al, Mg is more reactive and will displace Al from solution; therefore Mg would NOT be replaced by Al.

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