1.

Assertion: S_(N)2 reactions proceed with inversion of configuration. Reason: S_(N)2 reactions occur in one step.

Answer»

If both assertionn and REASON are true, and reason is the true explanation of the assertion.
If both assertion and reason are true, but reason is not the true explanation of the assertion.
If assertion is true, but reason is false.
If both assertion and Reason are false.

Solution :Correct explanation: The attack of nucleophile occurs from a SIDE opposite to the HALOGEN ATOM resulting in inversion of CONFIGURATION.


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