Which of the following molecules has the highest bond energy?

The correct order of bond dissociation energy among $N_2, O_2, O_2^-$ is shown in which of the following arrangements?

Which one of the following pairs of species have the same bond order?

Give the electron configuration,bond order,magnetic property,and $MO$ energy diagram for the Helium $(He_{2})$ molecule.

The molecular orbital configuration of a diatomic molecule is
$\sigma 1s^2 \sigma^* 1s^2 \sigma 2s^2 \sigma^* 2s^2 \sigma 2p_x^2 \pi 2p_y^2 \pi 2p_z^2$
Its bond order is

Which of the following species has the highest bond order?