Question

Explain the electronic concept of oxidation and reduction. [3 MARKS]

Answer 1

Each point: 1.5 Mark

1. Oxidation- The loss of an electron by atoms or ions is called oxidation.

Atom $\to$ Cation + electrons, A $\to$ ${\text{A}}^{\text{n}+}+{\text{ne}}^{-}$

Atom 'A' loses n electrons to become a positively charged ion ${\text{A}}^{\text{n}+}$, known as cation.

2. Reduction: The gain of an electron by an atom or ion is called reduction.

B + ${\text{ne}}^{-}\to {\text{Bn}}^{-}$

The atom B gains n electrons to become negatively charged ion ${\text{B}}^{\text{n}-}$, known as anion.