Question

Read the following statements and choose the correct option.
(i) $S _{ N } 1$ reactions are carried out through formation of carbocation as an intermediate.
(ii) $S _{ N }$ 1 reactions are two step reactions in whịch step 1 is fast and irreversible.
(iii) Step 1 involves breaking of $C - Br$ bond which obtain energy through solvation of halide.
(iv) $S _{ N } 1$ reactions are two step reactions in which step 2 is slow and reversible.

• A. (i), (iii) and (iv) are correct
• B. (ii), (iii) and (iv) are correct
• C. only (iii) and (iv) are correct
• D. (i), (ii) and (iv) are correct

Answer 1

Answer: (A)

In $S _{ N } 1$ reactions step $1$ is slow and reversible, and the slowest step is the rate determining step.