Question 1

In S _ N 2 substitution reaction of the type R- Br + Cl ^ - [ BMF ] R- Cl + Br ^ - Which one of the following has highest relative rate?

Accepted Answer

The rate of S_n 2 reaction is the maximum with 1^ allyl halide having least steric hindrance. Out of CH _3 CH _2 Br and CH _3 CH _2 CH _2 Br , CH _3 CH _2 Br has the least steric hindrance and hence has the highest relative rate.

Question 2

Identify correct reactivity order for S _ N 1 reaction

Accepted Answer

Answer option index: 3

Question 3

Among the given halides, which one will give same product in both S _ N 1 and S _ N 2 reactions.

Accepted Answer

S_ N ^2 and S_N 1 same, if C^ not rearrange.

Question 4

The reaction of C _6 H _5 CH = CHCH _3 with HBr produces

Accepted Answer

Electrophile addition reaction takes place via more stable carbocation.

Question 5

The major product ' Y ^ in the following reaction is :

Accepted Answer

Answer option index: 2

Haloalkanes and Haloarenes — Previous Year Questions & Solutions