Which one of the following arrangements does not give the correct picture of the trends indicated against it ?
A
F2 > Cl2 > Br2 > I2 : Bond dissociation energy
B
F2 > Cl2 > Br2 > I2 : Electronegativity
C
F2 > Cl2 > Br2 > I2 : Oxidizing power
D
F2 > Cl2 > Br2 > I2 : Electron gain enthalpy
Explanation
For Diatomic molecules (X2) of halogens the bond dissociation energy decreases in the order:
Cl2 > Br2 > F2 > I2
The oxidising power, electronegativity and relativity decrease in the order:
F2 > Cl2 > Br2 > I2
Order of Electron gain enthalpy of halogens
Cl2 > F2 > Br2 > I2
The low value of electron gain enthalpy of fluorine is probably due to small size of fluorine atom.
