Q.

Assertion: Fluoro alkane and fluoro arene are the least & most reactive halo compounds in nucleophilic aliphatic and aromatic (bi-molecular) substitution respectively
Reason: Fluorine is the poor leaving group, in both the above reactions

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a

Both Assertion and Reason are correct, and Reason explain Assertion

b

Assertion correct and Reason incorrect  

c

Assertion incorrect and Reason correct. 

d

Both Assertion and Reason are correct, and Reason does not explains Assertion

answer is B.

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Detailed Solution

In SNAr  bimolecular, addition step is rate determining step.

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