Consider the following species :CN^+, CN^-, NO and CNWhich one of these will have the highest bond order ?

1. NO

2. CN\(^+\)

3. CN\(^-\)

4. CN

Doubtly Asked 30 Oct 2026 NEET UG 2018 Practice test neet Save WhatsApp Report

1 answer

Best answer

Answer: 3. CN\(^-\)

Count electrons and fill the molecular orbitals.

\(\mathrm{CN^-}\): 14 electrons, bond order 3 (isoelectronic with \(\mathrm{N_2}\), CO).
CN: 13 electrons, bond order 2.5.
NO: 15 electrons, bond order 2.5.
\(\mathrm{CN^+}\): 12 electrons, bond order 2.

\(\mathrm{CN^-}\) has the highest bond order.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

Was this answer helpful?