Show how will you synthesie:
i. 1-Phenylethanol form a suitable alkene.
ii. Cyclohexylmethanol using an alkyl halide by `SN^(2)` reaction.
iii. Pentan-1-ol using a suitable alkyl halide.

Explanation

(i) Addition of `H_(2)O` to ethenylbenzene (or styrene) in presence of dil. `H_(2)SO_(4)` gives 1-phenylethanol.

(ii) Hydrolysis of cyclohexylmethyl bromide by aqueous NaOH gives cyclohexylmethanol

(iii) Hydrolysis of 1-bromopentane by aqueous `NaOH` gives pentan-1-ol.
`underset("1-Bromopentane")(CH_(3)CH_(2)CH_(2)CH_(2)CH_(2))-Br+NaOH(aq) underset(S_(N)2,"Hydrolysis")overset(Delta)to underset("Pentan-1-ol")(CH_(3)CH_(2)CH_(2)CH_(2)CH_(2))-OH+NaBr`