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Which one of the following arrangement does not truly represent the property indicated against it ?A. `Br_(2) lt Cl_(2)lt F_(2)` Oxidising powerB. `Br_(2) lt Cl_(2) lt F_(2)` ElectronegativityC. `Br_(2) lt F_(2) lt Cl_(2)` Electron affinityD. `Br_(2) lt Cl_(2) lt F_(2)` Bond energy |
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Answer» Correct Answer - 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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