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  4. Which halogen atom/group is present in the final major product of the following reaction?

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Q. Which halogen atom/group is present in the final major product of the following reaction?Chemistry Question Image

Haloalkanes and Haloarenes

Solution:

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The leaving group order is: $F > Cl > Br > I$.
The ' $F$ ' atom is $p$-position w.r.t. $EWG (-CN)$ whereas the '$Cl$' atom is at $m$-position w.r.t. $(-CN)$ group. The second equivalent of $NaOH$ further reacts with $Br$.