Question

Which of the following statements is incorrect ?

• A. Among O2+, O2 and O2- the stability decreases as O2+> O2> O2-
• B. He2 molecule does not exist as the effect of bonding and anti-bonding orbitals cancel each other .
• C. C2 ,O22 - and Li2 are diamagnetic
• D. In F2 molecule, the energy of $\sigma_{2p_{z}}$ is more than$\pi_{2p_{x}}$ and$\pi_{2p_{y}}$

Answer 1

Answer: (D)

In F2 molecule, the energy of $\sigma_{2p_{z}}$ is more than$\pi_{2p_{x}}$ and$\pi_{2p_{y}}$

Answer 2

(1) Stability O2+ > O2 > O2–

Bond order 2.5 2 1.5

(3) In all these molecules all electrons are paired in molecular orbitals.