Question

Which one is paramagnetic and has a bond order of $\frac{1}{2}$?

• A. $O_2^{-}$
• B. $N_2^{+}$
• C. $F_2$
• D. $H_2^{+}$

Answer 1

The correct option is D $H_2^{+}$

$H_2^{+}$ has the bond order $\frac{1}{2}$, it has only one electron so it will be paramagnetic.

Presence of unpaired electron in any of molecular orbital makes the molecule or ion paramagnetic.