Question

The decomposition of $KCI{O}_3$ to $KCl$ and $O_2$ on heating is an example of :

• A. intermolecular redox change
• B. intramolecular redox change
• C. disproportionation or auto redox change
• D. none of the above

Answer 1

Answer: (B)

intramolecular redox change

Disproportionation is a specific type of redox reaction in which a species is simultaneously reduced and oxidised to form two different products.
An intramolecular redox change is one in which one element of a compound is oxidised and one element is reduced.
For example:
$2KCl{O}_3\to 2KCl+3O_2$.
$+5-10$
Here, $Cl$ is reduced and oxygen is oxidised so, its a intramolecular redox change.