Which of the following reaction(s) can be used for the preparation of alkyl halides? (I) CH_(3)CH_(2)OH+HCl overset("anhyd." ZnCl_(2))to (II) CH_(3)CH_(2) OH+HCl to (III) (CH_(3))_(3)COH+HCl to (IV) (CH_(3))_(2)CHOH+HCl overset("anhyd." ZnCl_(2))to

Which of the following reaction(s) can be used for the preparation of

1.	Which of the following reaction(s) can be used for the preparation of alkyl halides? (I) CH_(3)CH_(2)OH+HCl overset("anhyd." ZnCl_(2))to (II) CH_(3)CH_(2) OH+HCl to (III) (CH_(3))_(3)COH+HCl to (IV) (CH_(3))_(2)CHOH+HCl overset("anhyd." ZnCl_(2))to
Answer» (IV) only (III) and (IV) only (I), (III) and (IV) only (I) and (II) only Solution :`1^(@)` and `2^(@)` alcohols react with HCl in the presence of ANHYDROUS `ZnCl_(2)` while in case of `3^(@)` alcohol, anhydrous `ZnCl_(2)` is not needed. Therefore, alkyl HALIDES can be prepared by REACTIONS (I), (III) and (IV).