Published by:
CGP EDU Academic Team
Published on: August 12, 2026
A certain reaction proceeds in sequence of three elementary steps with rate constant k 1 , k 2 & k 3 . If k obs = 
. k 3 the observed E a is -
A
B
C
D
E 3 + 
[E 1 –E 2 ]
[E 1 –E 2 ]
Text Solution
Verified by ExpertsThe correct answer is:
D
k 0 = 
⋅ k 3 ……..(1)
k = A e –ta/RT ……..(2)
from (1) & (2)
Ae –Ea/RT = 
i.e. E a = 
[Ea 1 – Ea 2 ] + Ea 3
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