AIPMT 2008 Physics and Chemistry Paper

In case of diatomic molecules (X2) of halogens the bond dissociation energy decreases in the order :
Cl2>Br2>F2>I2
The oxidizing power, electronegativity and reactivity decrease in the following order:
F2>Cl2>Br2>I2
Electron gain enthalpy fo halogens decreases in the following order :

Cl2>F2>Br2>I2
The low value of electron gain enthalpy of fluorine is due to small size of fluorine atom.