Question

The Size of the molecule is of the order of.
lWrite your response.​

Answer 1

Answer:

Hence, the correct option is B.

Explanation:

Bond dissociation energy of halogen family decreases down the group as the size of atom increases.

The decreasing order for the bond dissociation enthalpy of halogen molecules is Cl

2

57 kcal/mol>Br

2

45.5 kcal/mol>F

2

38 kcal/mol> 35.6 kcal/molI

2

.

A halogen molecule having larger atoms should have low dissociation energy and vice versa. Fluorine is an exception because of interelectronic repulsion is present in small atom fluorine.