Question

Assertion: Decomposition of potassium chlorate is an example of redox reaction.
Reason: There is no change in the oxidation number of potassium in decomposition of potassium chlorate.

• A. If both assertion and reason are true and reason is the correct explanation of assertion.
• B. If both assertion and reason are true but reason is not the correct explanation of assertion.
• C. If assertion is true but reason is false.
• D. If both assertion and reason are false.

Answer 1

Answer: (B)

Decomposition of potassium chlorate can be represented a s :

$\overset{+5}{Cl}$ is reduced to $\overset{-1}{Cl}$ and $\overset{-2}{O}$ is oxidised to $\overset{0}{O}_{2}, $ hence reaction is a redox reaction.