Question

Which of the following will favour the decomposition of $KCl{O}_3$?

• A. $V_2{O}_5$
• B. $Mn{O}_2$
• C. $F{e}_3{O}_4$
• D. $Ni$

Answer 1

The correct option is B $Mn{O}_2$

A powdered mixture of $KCl{O}_3$ is heated in presence of $Mn{O}_2$ (catalyst) to prepare oxygen in the laboratory.

$2KCl{O}_3\underset{Mn{O}_2}{\overset{{150}^{\circ }C}{\to }}2KCl+3O_2+\text{Traces of}C{l}_2\text{or}Cl{O}_2$