The pair of species with the same bond order is

Which of the following molecular orbitals has two nodal planes?

The formation of molecular orbitals can be described by the linear combination of atomic orbitals. Which one of the following correctly represents the formation of bonding molecular orbital from the atomic orbitals having wave functions $\psi_A$ and $\psi_B$?

The ground state magnetic property of $B_{2}$ and $C_{2}$ molecules will be

According to Molecular Orbital Theory,which of the following statements is/are correct?
$(A)$ $C_2^{2-}$ is expected to be diamagnetic
$(B)$ $O_2^{2+}$ is expected to have a longer bond length than $O_2$
$(C)$ $N_2^{+}$ and $N_2^{-}$ have the same bond order
$(D)$ $He_2^{+}$ has the same energy as two isolated $He$ atoms

According to molecular orbital theory,antibonding molecular orbitals of $O_2$ contain