Question

The magnetic moment of $K{O}_2$ at room temperature is ______ B.M.

• A. $1.41$
• B. $1.73$
• C. $2.23$
• D. $2.64$

Answer 1

The correct option is B $1.73$

The superoxide $\left(O^{2-}\right)$ is paramagnetic

Because of one unpaired electron $(n=1)$ in $2p$ molecular orbital.

Magnetic moment $=\sqrt{n(n+2)}=\sqrt{3}=1.73$ B.M.