Which one of the following orders is not in accordance with the property stated against?

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Which one of the following orders is not in accordance with the property stated against?

A $F_{2} > Cl_{2} > Br_{2} > I_{2} : Oxidising power$
B $HI > HBr > HCl > HF : Acidic property in water$
C $F_{2} > Cl_{2} > Br_{2} > I_{2} : Electronegativity$
D $F_{2} > Cl_{2} > Br_{2} > I_{2} : Bond dissociation energy$

Solution & Step-by-step Explanation

The bond dissociation energy of halogens does not decrease uniformly down the group. Because the fluorine atom is extremely small, there is strong interelectronic repulsion among lone pairs in the compact F_{2} molecule, drastically lowering its bond dissociation energy. The correct order of bond dissociation energy is Cl_{2} > Br_{2} > F_{2} > I_{2} .

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Which one of the following orders is not in accordance with the property stated against?

F_{2} > Cl_{2} > Br_{2} > I_{2} : Oxidising power

HI > HBr > HCl > HF : Acidic property in water

F_{2} > Cl_{2} > Br_{2} > I_{2} : Electronegativity

F_{2} > Cl_{2} > Br_{2} > I_{2} : Bond dissociation energy

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