Question

What do you understand by redox reactions? Explain oxidation and reduction in terms of loss or gain of electrons.

Answer 1

Redox reactions involve the transfer of electrons between two chemical species.

The reaction in which electron is lost is called oxidation reaction.

Example : Zn $\to$ Zn${}^{2+}$+ 2e-

The reaction in which electron is gained is called a reduction reaction.

Example: Cu${}^{2+}$ + 2e- $\to$ Cu