Question

The rate determining step during a $S_{N}1$ reaction is.

• A. Formation of carbocation
• B. Attack of nucleophile
  
• C. both above are rate determining step
• D. can't predict

Answer 1

The correct option is A Formation of carbocation

The rate determining step (RDS) is the slowest step in a reaction on which the rate of the reaction depends. Formation of carbocation governs the rate of $S_{N}1$ reaction and is rate determining step. Hence correct option is a.