Which of the following reaction(s) can be used for the preparation of alkyl halides?
(I) $C H_{3} C H_{2} O H + H C l a n h . Z n C l_{2} - ----- \to$
(II) $C H_{3} C H_{2} O H + H C l \to$
(III) $(C H_{3})_{3} C O H + H C l \to$
(IV) $(C H_{3})_{2} C H O H + H C l a n h . Z n C l_{2} - ----- \to$

(I V)

only

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(I I I)

and

(I V)

only

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(I), (I I I)

and

(I V)

only

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(I)

and

(I I)

only

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Solution

The correct option is D $(I), (I I I)$ and $(I V)$ only
The reactions $(I), (I I I)$ and $(I V)$ only can be used for the preparation of alkyl halides.
Alkyl halide is prepared by the reaction of an alcohol with $H C l$ in which - $O H$ group is replaced with $C l$ .
Primary and secondary alcohols requires catalyst such as anhydrous zinc chloride.
Tertiary alcohols do not require such catalyst as they are more reactive.

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Similar questions

C H_{3} C H_{2} O H + H C l a n h . Z n C l_{2} - ----- \to

C H_{3} C H_{2} O H + H C l \to

(C H_{3})_{3} C O H + H C l \to

(C H_{3})_{2} C H O H + H C l a n h . Z n C l_{2} - ----- \to

Which of the following process / processes release heat ?
(i) condensation (ii) vaporisation (iii) freezing (iv) melting

(a) only (i) (b) only (iv) (c) (i) and (iii) (d) (ii) and (iv)

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