Class 12 NEET Chemistry Haloalkanes and Haloarenes

I>Br>Cl>F→ atomic radii
F, Cl, Br, I belongs to the same group orderly.
Atomic radii go on increasing as the nuclear charge increases in preceeding downwards in a group. The decreasing order of bond length C−I>C−Br>C−Cl>C−F.
The order of bond dissociation energy R−F>R−Cl>R−Br>R−I.
During dehydrohalogenation C−I bond breaks more easily than C−F bond. So reactivity order of halides is, R−I>R−Br>R−Cl>R−F.