Question

Which statement is wrong? 

(a) Bond energy of F₂ > Cl₂ 

(b) Electronegativity of F > Cl 

(c) F is more oxidising than Cl 

(d) Electron affinity of Cl > F

Answer 1

The correct option is : (a) Bond energy of F₂ > Cl₂ 

Explanation:

Due to more repulsion in between non-bonding electron pair (2p) of two fluorines (due to small size of F-atom) in comparison to non-bonding electron pair (3p) in chlorine, the bond energy of F₂ is less than Cl₂.

BE (F₂) = 158.5 kJ/mole and

BE (Cl₂) = 242.6 kJ/mole.