Single Choice

When chlorine is passed through hot concentrated caustic soda solution, the oxidation number of chlorine in one of the products increases from:

A$$0$$ to $$+7$$
B$$-1$$ to $$+7$$
C$$0$$ to $$+5$$
Correct Answer
D$$0$$ to $$-1$$

Solution

Chlorine reacts with a hot concentrated $$NaOH$$ solution to form sodium chloride and sodium chlorate. The oxidation number of chlorine increases from $$0$$ (in chlorine element) to $$+5$$ (in sodium chlorate) and decreases from $$0$$ to $$-1$$ (in sodium chloride).

The reaction is as follows:

$$3Cl_2 +6NaOH \rightarrow 5NaCl + NaClO_3 +3H_2O$$

Hence, option $$C$$ is the correct answer.

SIMILAR QUESTIONS

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