Question

The order of the bond energies of the halogen molecules is

• A. F₂> Cl₂> Br₂> I₂
• B. Cl₂> Br₂> F₂> I₂
• C. Cl₂> F₂> Br₂> I₂
• D. Cl₂> Br₂> I₂> F₂

Answer 1

Answer: (B)

Cl₂> Br₂> F₂> I₂

Answer 2

Bond dissociation energies , D of the halogen molecules are

D_{F – F} = 126 kJ/mol ; D_{Cl – Cl} = 210 kJ/mol ;

D_{Br – Br} = 158 kJ/mol ; D_{I – I} = 118 kJ/mol ;