Classify the following reactions in one of the reaction type studied in this unit.
(a) CH3CH2Br + HS− → CH3CH2SH + Br−
(b) (CH3)2C = CH2 + HCl → (CH3)2CCl—CH3
(c) CH3CH2Br + HO− → CH2 = CH2 + H2O + Br−
(d) (CH3)3C — CH2OH + HBr → (CH3)2CBrCH2CH3 + H2O
(a) Nucleophilic substitution
(b) Electrophilic addition
(c) Bimolecular elimination
(d) Nucleophilic substitution with rearrangement.