Question

$H_2{O}_2$ is:

• A. diamagnetic
• B. paramagnetic
• C. ferromagnetic
• D. none of these

Answer 1

Answer: (A)

Because peroxide ion $\left(O_2^{2-}\right)$ is diamagnetic.

no. of $e^{-}s=18:\sigma {1s}^2{\sigma }^{\ast }{1s}^2\sigma {2s}^2{\sigma }^{\ast }{2s}^2$

$\sigma 2{px}^2\pi 2{px}^2-\pi 2{py}^2$

${\pi }^{\ast }{2px}^2-{\pi }^{\ast }{2py}^2$

All $e^{-}s$ are period $\therefore$ diamegnetic.