Published by:
CGP EDU Academic Team
Published on: August 13, 2026
A certain reaction A 
B follows the given concentration (molarity)-time graph. Which of the following statement is true?
Text Solution
Verified by ExpertsThe correct answer is:
B
Time required for concentration to change from 0.4to 0.2is same as the time required for the concentration to change from 0.2 to 0.1, it means t 1/2 is independent of initial concentration, i.e. it is a first order reaction.
And from the graph t 1/2 = 20 s
Rate = k[A]
At 40 second[A] = 0.1
rate = 
= 3.46 x 10 -3 Ms+ l
= 3.5 x 10 -3 s -1
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