Chemistry-(general)
NEET Chemistry (general) Assertion Reason Question
Type: Assertion Reason-assertion-Easy-Class 12
Assertion (A): The half-life of a first order reaction is independent of the initial concentration of the reactant. | Reason (R): In a first order reaction, the rate constant is directly proportional to the initial concentration of the reactant.
A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false but R is true.
Correct Answer
Option C
Detailed Explanation
The half-life of a first order reaction is indeed independent of the initial concentration of the reactant, as shown by the equation t1/2 = 0.693/k. However, the rate constant (k) in a first order reaction is independent of the initial concentration, not directly proportional.
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