Question

hydrogen gas will not reduce A heated cupric oxide B heated ferric oxide C heated stannic oxide D heated Aluminium oxide

Answer 1

A heated cupric oxide

Answer 2

● Answer -
(D) heated aluminum oxide

● Explanation -
- Electrochemical series is a series of chemical elements arranged in order of their standard electrode potentials.
- From top to bottom in electrochemical series, reducing potential increases and oxidizing potential decreases.
- From the series, we can say that reducing potential of hydrogen is less than that of aluminium.
- Therefore, hydrogen can't reduce aluminum salts i.e. heated aluminum oxide in this case.


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