Question

Which of the following is not a cathodic reaction? ​

Answer 1

Explanation:

Among the given reactions Fe2+→Fe3++e− is an oxidation reaction and thus will not take place at cathode.

Answer 2

Answer:

The Correct Answer is Option (d): Zn → $Zn^{2+}$+ 2e-

Explanation:

The anode is the electrode that undergoes oxidation, while the cathode is the electrode that undergoes reduction in an electrochemical cell.

In all the other reactions electrons are on the reactant side gain) which means oxidation is taking place there

Any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron is known as an oxidation-reduction reaction.

$Zn -> Zn^{2+} + 2e^{-}$ is an oxidation reaction