Question

Question 15

The following reaction is used for the preparation of oxygen gas in the laboratory.

$2{\text{KClO}}_3\text{(s)}\stackrel{\text{Heat}}{\to }2\text{KCl (s)}+3{\text{O}}_2\text{(g)}$

Which of the following statement(s) is (are) correct about the reaction?
(a) It is a decomposition reaction and endothermic in nature.
(b) It is a combination reaction.
(c) It is a decomposition reaction and accompanied by release of heat.
(d) It is a photochemical decomposition reaction and exothermic in nature.

Answer 1

Option (a) is correct.

In this reaction ${\text{KClO}}_3$ undergoes thermal decomposition to form $\text{KCl}$ and ${\text{O}}_2$. The reaction is endothermic in nature as heat is getting absorbed.