AIPMT MAINS2009Chemistry-Chemical Kinetics
AIPMT MAINS 2009 Chemistry Rate Law 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 C
Detailed Explanation
The rate law indicates that the reaction is first order with respect to A and second order with respect to B. Doubling A doubles the rate, and doubling both A and B increases the rate by a factor of 8.
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