Question

If chlorine gas is passed through hot NaOH solution, two changes are observed in the oxidation number of chlorine during the reaction. These are :

(i) 0 to +5

(ii) 0 to +3

(iii) 0 to –1

(iv) 0 to +1

Answer 1

(i) 0 to +5

(iii) 0 to –1

Explanation:

\[\ce{6NaOH + 3Cl2 -> 5NaCl + NaClO3 + 3H2O}\]

Chlorine gas oxidation number ranges from 0 to –1 to 0 to +5.