Which of the following species is not paramagnetic?

Which of the following molecular orbitals has two nodal planes?

Which of the following statements is not correct?
$I$) Bond length order: $H_2^- = H_2^+ > H_2$
$II$) $O_2^+, NO, N_2^-$ have the same bond order of $2.5$
$III$) Bond order can assume any value including zero up to four
$IV$) $NO_3^-$ and $BO_3^{3-}$ have the same bond order for the $X-O$ bond (where $X$ is the central atom)

$H_{2}$ molecule is more stable than $Li_{2}$ molecule,because

Which of the following options is incorrect regarding the stability of diatomic molecules?

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