Published by:
CGP EDU Academic Team
Published on: August 12, 2026
A first order reaction is 
completed in 
. How much time would it take for 
completion?
A
B
C
D
Infinite
Text Solution
Verified by ExpertsThe correct answer is:
D
The time the concentration of a reactant is reduced to half of its original value is called half life period of the reaction. But it is impossible to perform 
of the reaction. Whole of the substance never reacts because in every half-life, 
of the substance reacts. Hence, time taken for 
completion of a reaction is infinite.
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