Published by:
CGP EDU Academic Team
Published on: August 13, 2026
A first order reaction is 
complete in 20 minutes. How long will the reaction take to be 
complete?
A
54 mins
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
: If 
then 
in 20 minutes
Rate constant 
.
The time for 
completion of the reaction is
substituting the value of 
from eq. (1) we get
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