Question

Explain the Redox reaction with an example?

Answer 1

Redox reactions are the reactions in which oxidation and reduction reactions takes place simultaneously.

One species loses electrons and is oxidized. Its oxidation number increases.

Other species gains electrons and is reduced. Its oxidation number decreases.

Thus electrons are transferred from one species to other species. Redox reactions are electron transfer reactions.
$Zn\left(s\right)+C{u}^{2+}\left(aq\right)\to Cu\left(s\right)+Z{n}^{2+}\left(aq\right)$

$Zn$ loses 2 electrons and is oxidized to $Z{n}^{2+}$.

$C{u}^{2+}$ gains 2 electrons and is reduced to $Cu$.