Velocity of the S_(N^(2)) reaction depends on the concentration of the substrate as well as te nucleophile. The reaction is favoured by strong Nu^(overset(..)(ө)), and in the presence of polar aprotic solvent, optically active halides give walden inversion by S_(N^(2)) mechanism. the presence of hetro group (atom as beta-C atom, unsaturation at beta-C, and (-overset(O)overset(||)(C)-) Allyl halides also give S_(N^(2)) mechanism. EDG at ortho-and para-positions in benzyl halides favours S_(N^(1)) mechanism, whereas EWG favours S_(N^(2)) mechanism. Q. Which of the following will give Walden inversion

Velocity of the S_(N^(2)) reaction depends on the concentration of the

1.	Velocity of the S_(N^(2)) reaction depends on the concentration of the substrate as well as te nucleophile. The reaction is favoured by strong Nu^(overset(..)(ө)), and in the presence of polar aprotic solvent, optically active halides give walden inversion by S_(N^(2)) mechanism. the presence of hetro group (atom as beta-C atom, unsaturation at beta-C, and (-overset(O)overset(\|\|)(C)-) Allyl halides also give S_(N^(2)) mechanism. EDG at ortho-and para-positions in benzyl halides favours S_(N^(1)) mechanism, whereas EWG favours S_(N^(2)) mechanism. Q. Which of the following will give Walden inversion
Answer» `C_(4)H_(9)-CHD-Br` All of these Solution :(a) is only OPTICALLY active and will have WALDEN inversion.