Which of the following molecular orbitals has two nodal planes?

Which one of the following sketches is not correctly matched?

In the molecular orbital diagram for the molecular ion,$N_2^+$,the number of electrons in the $\sigma_{2p_z}$ molecular orbital is

Is the neon molecule $Ne_2$ possible? Why?

Number of molecules having bond order $2$ from the following molecules is: $C_2, O_2, Be_2, Li_2, Ne_2, N_2, He_2$

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