Q. 854.0( 1 Vote )

Note : In the fol A. Assertion and reason both are correct and reason is correct explanation of assertion.

B. Assertion and reason both are wrong statements.

C. Assertion is correct but reason is wrong statement.

D. Assertion is wrong but reason is correct statement.

E. Assertion and reason both are correct statements but reason is not correct explanation of assertion.

Assertion : Phosphorus chlorides (tri and penta) are preferred over thionyl chloride for the preparation of alkyl chlorides from alcohols.

Reason : Phosphorus chlorides give pure alkyl halides.

Answer :

Thionyl chloride is preferred over phosphorous chlorides because along with the alkyl halides formed, the by-products are SO2 and HCl, which are gaseous and hence can escape the reaction leaving pure halides.

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