Tertiary halides mainly undergo elimination rather than substitution. Justify

Which of the following alkyl halides mainly undergo reaction by SN^2 mechanism.

Aliphatic nucleophilic substitution mainly takes place by two mechanisms (i.e) SN^1 & SN^2 Primary halides mainly undergo by SN^2 mechanism and are favourable in polar aprotic solvents. SN^1 reactions takes place mainly by tertiary halide and are more favourable in polar protic solvents, In case of tertiary halides, E_1 comes competition to SN^1 reaction. Keeping in view of these general points, answer the following questions Which of the following reactions, the reactions takes place by SN^1 mechanism mainly.

Aliphatic nucleophilic substitution mainly takes place by two mechanisms (i.e) SN^1 & SN^2 Primary halides mainly undergo by SN^2 mechanism and are favourable in polar aprotic solvents. SN^1 reactions takes place mainly by tertiary halide and are more favourable in polar protic solvents, In case of tertiary halides, E_1 comes competition to SN^1 reaction. Keeping in view of these general points, answer the following questions (+)C_6H_5CH(CH_3)Cl to (pm) C_6H_5CH(OH)CH_3 in which of the following solvents, the above reaction is most favourable

Tertiary alkyl halide among the following is

Tertiary alkyl halide among the following is

Explain why benzene mainly undergoes electrophilic substitution reaction ?

Aryl halides are less reactive than alkyl halides due to the presence partial double character of C - X bond in aryl halides. Arly halides undergo nucleophilic substitution reactions, if electron withdrawing groups are introduced in ortho & para - positions in aryl halides. The reaction mechanism involves two steps. Keeping these points in view answer the following questions. Which compound undergo nucleophilic substitution under mild conditions

Acid halides undergo esterification at a faster rate than acids. Explain?