JEE Main 2019ChemistryHydrocarbonsReaction Of AlkaneseasyMCQ
JEE Main 2019 — Hydrocarbons Question with Solution
From: JEE Main 2019 (Online) 9th April Evening Slot
Question
Which of the following potential energy (PE)
diagrams represents the SN1 reaction?
Choose an option
▸Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
SN1 reaction happens in two steps :
1st step : Formation of carbocation intermediate when leaving group leaves.
2nd step : The nucleophile attacks the carbocation, forming the
product.
In SN1 reaction, formation of carbocation
(1st step) is called rate determining step (RDS). RDS is the most difficult and slowest step. That is why potential energy required to complete first step is more compare to the second step.
So option A should be the right option.
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