NEET · Chemistry · STD 11 - 4. Chemical bonding and molecular structure
Which of the following is paramagnetic ?
- A \(CN^-\)
- B \(NO^+\)
- C \(CO\)
- D \(O_{2}^-\)
Answer & Solution
Correct Answer
(D) \(O_{2}^-\)
Step-by-step Solution
Detailed explanation
\(\mathrm{CN}^{-}, \mathrm{CO}\) and \(\mathrm{NO}^{+}\) are isoelectronic with 14 electrons each and there is no unpaired electrons in the MO configuration of these species. So these are diamagnetic. \(\mathrm{O}_{2}^{*}\) is paramagnetic due to the presence of one unpaired electron.
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