Which of the following molecule$(s)$ show$(s)$ paramagnetic behavior?
$(A) O_2$ $(B) N_2$ $(C) F_2$ $(D) S_2$ $(E) Cl_2$
Choose the correct answer from the options given below:

Which of the following has two nodal planes?

The bond order 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).

What is the bond order of $O_2^-$ (in $.5$)?

During the conversion of peroxide ion $(O_2^{2-})$ to superoxide ion $(O_2^-)$,an electron is removed from which of the following molecular orbitals?