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Polarity and Dipole Moments

Alkyl halides...

Question

Alkyl halides follow the reactivity sequence, $R - I > R - B r > R - C l > R - F$ .

A

True

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B

False

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Solution

The correct option is A True
Alkyl halides follow the reactivity sequence, $R - I > R - B r > R - C l > R - F$
As the $C - X$ bond energy increases, the halogen reactivity decreases.
$C - F$ bond energy is maximum. Hence, fluorides are least reactive.

On the other hand, $C - I$ bond energy is minimum and iodides are most reactive. In other words, among the four halide ions, iodide is the best leaving group making alkyl iodide most reactive.

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