Which one of the following halogens has the highest bond dissociation energy?

Question

Which one of the following halogens has the highest bond dissociation energy? (A)  F2  (B)  Cl2  (C)  Br2  (D)  I2

Tardigrade Admin · Accepted Answer

As the size increases bond length increases, thus bond dissociation energy decreases. Molecule Bond dissociation energy F2 158.8 Cl2 242.6 Br2 192.8 I2 151.1 However, the dissociation energy of fluorine is less because of its small size. Hence, textC textl text2 has the highest bond dissociation energy

Q. Which one of the following halogens has the highest bond dissociation energy?

$F_{2}$

$C l_{2}$

$B r_{2}$

$I_{2}$

Q. Which one of the following halogens has the highest bond dissociation energy?

F2​

Cl2​

Br2​

I2​

$F_{2}$

$C l_{2}$

$B r_{2}$

$I_{2}$