According to molecular orbital theory,the total number of bonding electron pairs in $O_2$ is

$AX$ is a covalent diatomic molecule where $A$ and $X$ are second row elements of the periodic table. Based on Molecular Orbital Theory,the bond order of $AX$ is $2.5$. The total number of electrons in $AX$ is ........... (Round off to the nearest integer).

After understanding the assertion and reason, choose the correct option.
Assertion : In the bonding molecular orbital $(MO)$ of $H_2,$ electron density is increased between the nuclei.
Reason : The bonding $MO$ is $\psi_A + \psi_B,$ which shows destructive interference of the combining electron waves.

Which of the following is paramagnetic?

In the conversion of $N_2$ into $N_2^+$,the electron will be lost from which of the following molecular orbitals?

In which of the following transformations,the bond order has increased and the magnetic behaviour has changed?