NEET UG CHEMISTRY MCQ: CHEMICAL BONDING & MOLECULAR STRUCTURE

Consider the following statement
I. When $\mathrm{O}_2$ is converted into $\mathrm{O}_2^{2+}$ bond order decreases.
II. $\mathrm{O}_2$ molecule is paramagnetic because it contains two unpaired electrons in $\mathop \pi \limits^ * 2{p_x}$ and $\mathop \pi \limits^ * 2{p_y}$ molecular orbitals.
III. The bond length in $\mathrm{NO}$ is greater than in ${\text{N}}\mathop {\text{O}}\limits^ +$.
Choose the correct statements.