MCQ on REDOX REACTIONS

Mcq on REDOX REACTIONS Mcq on REDOX REACTIONS

One important category of chemical reactions is redox reactions. Several phenomena, both physical and biological, are concerned with redox reactions. There are many uses of redox reactions in pharmaceutical, biological, agricultural, metallurgical, and many more industries.

Redox is a chemical reaction in which oxidation and reduction occur simultaneously. In a redox reaction, one substance is oxidized, and the other is reduced. Hence, oxidation and reduction proceed simultaneously.
(i) Oxidation means a loss of electrons or increase in oxidation number. For example,
Na → Na⁺ +e^-
Sn+^2_→Sn⁺⁴ + 2e^-
(ii) Reduction means a gain of electrons or decrease in oxidation number. For example,
Fe+^3₊e^–_→Fe⁺²
Cl₂ 2e^–→ 2Cl^-