Q. The concentration of R in the reaction R$\rightarrow$P was measured as a function of time and the following data is obtained [table] [R](molar) | 1.00 | 0.75 | 0.40 | 0.10 ; t (min) | 0.00 | 0.05 | 0.12 | 0.18 [/table] The order of the reaction is
A) Zero
B) First
C) Second
D) Third
Explanation
(a)
$k_{I} = \frac{\mathrm{\Delta}\lbrack R\rbrack}{\mathrm{\Delta}t} = \frac{0.25}{0.05} = 5$
$k_{II} = \frac{\mathrm{\Delta}\lbrack R\rbrack}{\mathrm{\Delta}t} = \frac{0.60}{0.12} = 5$
So reaction must be zero order
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.