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CGP EDU Academic Team
Published on: August 13, 2026
The correct order of the rate of reaction of the following reactants with nucleophile by SN1 mechanism is: (Given: Structure I and II are rigid)
(I) (II)
(III) (IV)
A
(III) 
(I) 
(II) 
(IV)
(I) (II) (IV) B
(IV) 
(III) 
(II) 
(I)
(III) (II) (I) C
(I) 
(II) 
(III) 
(IV)
(II) (III) (IV) D
(II) 
(I) 
(III) 
(IV)
(I) (III) (IV)
Text Solution
Verified by ExpertsThe correct answer is:
D
Rate of 
Stability of 
formed
(I) and (II) are unstable due to Bredt's rule, (I) has more + I effect.
(II) 
(I) 
(III) 
(IV)
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