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Which one of the following arrangements ...

Which one of the following arrangements does not give the correct picture of the trends indicated against it ?

A

`Br_(2) lt Cl_(2)lt F_(2)` Oxidising power

B

`Br_(2) lt Cl_(2) lt F_(2)` Electronegativity

C

`Br_(2) lt F_(2) lt Cl_(2)` Electron affinity

D

`Br_(2) lt Cl_(2) lt F_(2)` Bond energy

Text Solution

Verified by Experts

The correct Answer is:
D
Shond dissociation enthalphy of halogen follows the sequnecy as
`Cl_(2) gt Br gt F_(2) gt I_(2)`
Enthalpy of dissociation decreasss as the bond distance increases from `F_(2)` to `I_(2)` due to a corresponding increases in size of the atom as one move down the group from F to i. However, the F.F bond dissociation enthalpy is smaller than that of `Cl-Cl` (even than that of Br-Br) because repulsion between the lons pairs of electrons are very large.
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