Question

Which of the following could be considered to be oxidation?

• A. $2H{g}^{2+}+2e^{-}\to H{g}_2^{2+}$
• B. $Z{n}^{2+}+2e^{-}\to Zn$
• C. $F{e}^{2+}\to F{e}^{3+}+e^{-}$
• D. $Mn{O}_4^{2-}\to Mn{O}_4^{-}+e^{-}$

Answer 1

Answer: (C), (D)

The correct options are
C $F{e}^{2+}\to F{e}^{3+}+e^{-}$
D $Mn{O}_4^{2-}\to Mn{O}_4^{-}+e^{-}$

Oxidation: Increase in oxidation number is oxidation and decrease in oxidation number is reduction.
It is a process in which an atom or a group of atoms taking part in a chemical reaction loses one or more electrons.
For example:
i. $Mg\to M{g}^{2+}+2e^{-}$
In option (c) and (d), there is a loss of electrons.
Therefore, (c) and (d) is correct.