Q. The reaction $L \rightarrow M$ is started with $10.0\ g\ of\ L.$ After 30 and 90 min, 5.0 g and 1.25 g of $\ L$ respectively are left. The order of the reaction is
A) 0
B) 1
C) 2
D) 3
Explanation
(b)
$10\ g \rightarrow 5\ g \rightarrow 2.5\ g \rightarrow 1.25\ g$ takes 30 min in each step, $ie,\ t^{1/2}$ is independent of $'a'$ hence, it is a first order reaction
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.