MCQ
The paramagnetic molecule at ground state among the following is
- A${H_2}$
- ✓${O_2}$
- C${N_2}$
- D$CO$
✓
Answer
Correct option: B.
${O_2}$
(b) So two unpaired electron found in $O_2$ at ground stage by which it shows paramagnetism.
${O_2} \to {(\sigma 1s)^2}{({\sigma ^*}1s)^2}{(\sigma 2s)^2}{({\sigma ^*}2s)^2}{({\sigma ^*}2p_z)^2}$
$(\pi 2p_x^2 \equiv \pi 2p_y^2)\;({\pi ^*}2p_x^1 \equiv {\pi ^*}2p_y^1)$
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