Question

In the class, teacher wrote some ions on the black board. It is given below.

1. Which among the ions, gain electron more easily?

2. Is it true that the reduction potential of hydrogen is less than that of Na and Mg?

3. Justify your answer.

Answer 1

1. Mg²⁺

2. No. The reduction potential of hydrogen is greater than that of both Na and Mg.

3. In electrochemical series, sodium and magnesium lie above hydrogen. Standard reduction potential of hydrogen electrode is taken as zero volt.