Q. Which of the following is diamagnetic?
A) $H_{2}^{+}$
B) $O_{2}$
C) $Li_{2}$
D) ${Fe}_{2}^{+}$
Explanation
(c)
Molecules or ion having no unpaired electrons are diamagnetic, $e.g$.,
$Li_{2} = 6e^{-} =$ $\sigma 1s^{2},\ _{\sigma}^{*}1s^{2}\ ,\sigma 2s^{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.