Which of the following reagent is preferred to prepare alkyl halides from alcohols?

PCl₅

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HCl gas in the presence of anhydrous ZnCl₂

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SOCl₂

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PCl₃

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Solution

The correct option is C
SOCl₂

Since thionyl chloride (SOCl₂) on reaction with alcohol gives alkyl chloride, sulphur dioxide and HCl as:

By products SO₂ and HCl are gases and can be easily removed.

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