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प्रश्न
Assertion (A): The half-life of a reaction is the time in which the concentration of the reactant is reduced to one-half of its initial concentration.
Reason (R): In first-order kinetics, when the concentration of reactant is doubled, its half-life is doubled.
पर्याय
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.
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उत्तर
Assertion (A) is true, but Reason (R) is false.
Explanation:
The half-life of a first-order reaction is independent of the initial concentration.
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संबंधित प्रश्न
The rate constant for a first order reaction is 100 s–1. The time required for completion of 50% of reaction is _______.
(A) 0.0693 milliseconds
(B) 0.693 milliseconds
(C) 6.93 milliseconds
(D) 69.3 milliseconds
For a first order reaction, show that time required for 99% completion is twice the time required for the completion of 90% of reaction.
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log k = 14.34 − 1.25 × 104 K/T
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Show that the half-life of zero order reaction is `t_(1/2) = ([A]_0)/(2k)`.
