Question

Assertion: $F_2$ and $O_2^{2-}$ have bond order $1$ while $N_2, CO$ and $NO^+$ have bond order $3$.
Reason : Higher the bond order, higher is the stability of the molecule

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (B)

Isoelectronic molecules and ions have identical bond orders. $F_2$ and $O_{2}^{2-}$ are isoelectronic with $18$ electrons each and $N_2$, $CO$ and $NO^+$ are isoelectronic with $14$ electrons each