Question

Which has maximum bond energy?

a)Cl₂ b)Br₂ c)F₂ d)I₂

Answer 1

The explanation for the correct option:

Option(a) $C{l}_2$

• Bond energy decreases down the group as the size of the atom increases.

• So, Fluorine is expected to have the highest bond dissociation enthalpy.

• But chlorine has the highest bonding energy than fluorine because the fluorine atom has a very small size due to which there is a high interelectronic repulsion between two fluorine atoms.

• Hence, the correct decreasing order is $C{l}_2>B{r}_2>F_2>I_2$ .

Hence, Option(a) $C{l}_2$ has the maximum bonding energy