Q. $KClO_{3}$ on heating decomposes into KCl and $O_{2}$. If some $MnO_{2}$ is added the reaction goes much faster because :
A) $MnO_{2}$ decomposes to give oxygen
B) $MnO_{2}$ provides heat by reacting
C) Better contact is provided by $MnO_{2}$
D) $MnO_{2}$ acts as a catalyst
Explanation
(d)
$MnO_{2}$speeds up the reaction.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.