Question

Which of the following property is incorrectly related to bond order?

• A. Bond order $\propto$ Bond strength
• B. Bond order $\propto$ Stability
• C. $\text{Bond order}\propto \frac{1}{\text{Bond length}}$
• D. $\text{Bond order}\propto \frac{1}{\text{Bond dissociation enthalpy}}$

Answer 1

The correct option is D $\text{Bond order}\propto \frac{1}{\text{Bond dissociation enthalpy}}$

Bond order is directly proportional to the bond strength of the molecule.
The length of the bond is determined by the number of bonded electrons i.e., the bond order. The higher the bond order, the stronger the pull between the two atoms and the shorter the bond length.

Higher the bond order higher the electrons are holding the atoms together and so greater the stability.

When bond order is higher, more electrons are holding the atoms, stronger the bond and hence more dissociation energy is required to break the bond