Question

As you may remember, NaCl is an ionic compound composed of Na+ and Cl− ions. In the oxidation-reduction reaction to form NaCl, which substance is oxidized and which is reduced?
A. Sodium is oxidized and chlorine is reduced.

B. Sodium is reduced and chlorine is oxidized.

C. Both sodium and chlorine are oxidized.

D. Both sodium and chlorine are reduced.

Answer 1

Answer: Option A

Explanation: 2 Na + Cl2---> 2NaCl

Here Oxidation no of Na is zero while in NaCl is +1. That means oxidation state of Na increased from 0 to +1 hence oxidation

While Cl2 has zero in molecular form and -1 in NaCl hence Reduction (Oxidation no decreased from zero to -1)

Halogens(cl) always shows -1 oxidation state and IA group elements(Na)shows +1 oxidation state