When the concentration of alkyl halide is tripled and concentration of nucleophile is reduced to half, the rate of S N 2 reaction is increased by

Step-by-step solution

Rate of S N 2 reaction is as follows: Rate = [alkyl halide] × [nucleophile] Rate (initially) = C 1 C 2 At new concentration R a t e f i n a l l y = 3 C 1 C 2 2 = 1.5 × C 1 C 2 Rate  final   =   1 .5   ×   Rate  initial