Question

Which one of the following order is correct for the bond dissociation enthalpy of halogen molecule?

Options

• Br₂ > I₂ > F₂ > Cl₂

• F₂ > Cl₂ > Br₂ > I₂

• I₂ > Br₂ > Cl₂ > F₂

• Cl₂ > Br₂ > F₂ > I₂

Answer 1

Cl₂ > Br₂ > F₂ > I₂

Explanation:

In F₂, therefore, inter electronic repulsion, therefore, bond dissociation enthalpy is less.