AIPMT PRELIMS2009Chemistry-Chemical Kinetics
AIPMT PRELIMS 2009 Chemistry Rate Laws MCQ Question
Type: MCQ-conceptual-Medium-Class 12
For the reaction A + B ⟶ products, it is observed that: (a) on doubling the initial concentration of A only, the rate of reaction is also doubled and (b) on doubling the initial concentrations of both A and B, there is a change by a factor of 8 in the rate of the reaction. The rate of this reaction is given by:
A
rate = k [A] [B]²
B
rate = k [A]² [B]²
C
rate = k [A] [B]
D
rate = k [A]² [B]
Correct Answer
Option A
Detailed Explanation
When concentration A is doubled, the rate is doubled, indicating first order with respect to A. Doubling both A and B increases the rate by 8 times, indicating second order with respect to B. Therefore, the rate law is rate = k [A] [B]².
Found an issue with this question?