Q. 4. Account for the following :
(i) Sulphuric acid is not used during the reaction of alcohols with KI.
(ii) p-methoxybenzyl bromide reacts faster than p-nitrobenzyl bromide with sodium ethoxide to form an ether product.
(iii) Organic halogen compounds used as solvents in industry are chlorides rather than bromides and iodides.
(iv) Wurtz reaction fails in case of tert-alkyl halides.
(v) Alkyl halides are insoluble in water though they contain a polar \( C - X \) bond.
(vi) Use of \( CHCl _{3} \) as anaesthetic is not preferred.