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Question: Answered & Verified by Expert
Assertion : Phosphorus chlorides (tri and penta) are preferred over thionyl chloride for the preparation of alkyl chlorides from alcohols.
Reason : Phosphorus chlorides give in pure alkyl halides.
ChemistryHaloalkanes and Haloarenes
Options:
  • A
    If both Assertion and Reason are correct and the Re is a correct explanation of the Assertion.
  • B
    If both Assertion and Reason are correct but Reast not a correct explanation of the Assertion.
  • C
    If the Assertion is correct but Reason is incorrect.
  • D
    If the Assertion is INcorrect but Reason is correct.
Solution:
1356 Upvotes Verified Answer
The correct answer is:
If the Assertion is INcorrect but Reason is correct.
Thionyl chloride is preferred over $\mathrm{PCl}_3$ and $\mathrm{PCl}_5$ for the preparation of alkyl chlorides from alcohols because Thionyl chloride gives pure alkyl halide as other two products $\left(\mathrm{SO}_2+\mathrm{HCl}\right)$ are escapable gases.

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