Question

Which of the following statement is INCORRECT ?

• A. Bond length of O₂ > Bond length of $O^{2+}_2$
• B. Bond order of $O^{+}_2$ < Bond order of $O^{2-}_2$
• C. Bond length of O₂ < Bond order of $O^{2-}_2$
• D. Bond order of O₂ > Bond order of $O^{2-}_2$

Answer 1

The Correct Option is B

Bond Length: The distance between the nuclei of two bonded atoms.

Bond Order: A measure of the number of chemical bonds between a pair of atoms; the formula is $\text{Bond Order} = \frac{\text{Number of Bonding Electrons} - \text{Number of Antibonding Electrons}}{2}$.

The incorrect statement is:

1. Bond length of $\text{O}_2$ < Bond length of $\text{O}_2^{2-}$
2. Bond order of $\text{O}_2$ > Bond order of $\text{O}_2^{2-}$
3. Bond length of $\text{O}_2$ > Bond length of $\text{O}_2^{2+}$
4. Bond order of $\text{O}_2^+$ < Bond order of $\text{O}_2^{2-}$

The correct answer is that statement 2 is incorrect because the bond order of $\text{O}_2^+$ is equal to the bond order of $\text{O}_2^{2-}$, not less than it.