Which one of the following orders in correct for the bond dissociation enthalpy of halogen molecules ?

Question

Which one of the following orders in correct for the bond dissociation enthalpy of halogen molecules ? (A) Cl 2> Br 2> F 2> I 2 (B) Br2 > I2 > F2 > Cl2  (C)  F2 > Cl2> Br2 > I2 (D) I2 > Br2 > Cl2 > F2

Tardigrade Admin · Accepted Answer

Cl2 > Br2 > F2 > I2 Bond dissociation energy of F2 less than Cl2 and Br2 because small size of f atom result in strong lone pair repulsion.

Q. Which one of the following orders in correct for the bond dissociation enthalpy of halogen molecules ?

$C l_{2} > B r_{2} > F_{2} > I_{2}$

$B r_{2} > I_{2} > F_{2} > C l_{2}$

$F_{2} > C l_{2} > B r_{2} > I_{2}$

$I_{2} > B r_{2} > C l_{2} > F_{2}$

$C l_{2} > B r_{2} > F_{2} > I_{2}$
Bond dissociation energy of $F_{2}$ less than $C l_{2}$ and $B r_{2}$ because small size of f atom result in strong lone pair repulsion.

Q. Which one of the following orders in correct for the bond dissociation enthalpy of halogen molecules ?

Cl2​>Br2​>F2​>I2​

Br2​>I2​>F2​>Cl2​

F2​>Cl2​>Br2​>I2​

I2​>Br2​>Cl2​>F2​

Cl2​>Br2​>F2​>I2​ Bond dissociation energy of F2​ less than Cl2​ and Br2​ because small size of f atom result in strong lone pair repulsion.

$C l_{2} > B r_{2} > F_{2} > I_{2}$

$B r_{2} > I_{2} > F_{2} > C l_{2}$

$F_{2} > C l_{2} > B r_{2} > I_{2}$

$I_{2} > B r_{2} > C l_{2} > F_{2}$

$C l_{2} > B r_{2} > F_{2} > I_{2}$
Bond dissociation energy of $F_{2}$ less than $C l_{2}$ and $B r_{2}$ because small size of f atom result in strong lone pair repulsion.