MCQ
Which one is paramagnetic from the following
- A$O_2^ - $
- B$NO$
- ✓Both $(a)$ and $(b)$
- D$C{N^ - }$
✓
Answer
Correct option: C.
Both $(a)$ and $(b)$
(c) $O_2^ - \,(2 \times 8 + 1 = 17)$ has odd number of electrons and hence it is paramagnetic.
All the remaining molecules/ions, i.e.,
$C{N^ - }(6 + 7 + 1 = 14)$ diamagnetic
$NO(7 + 8 = 15)$ has odd number of electrons and hence it is paramagnetic.
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