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  3. Chemistry
  4. Among the following, the paramagnetic compound is:

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Q. Among the following, the paramagnetic compound is:

NTA AbhyasNTA Abhyas 2020Chemical Bonding and Molecular Structure

Solution:

Odd number electron generally indicates paramagnetic nature and even number of electron diamagnetic nature
$\text{O}_{2}^{2 -} \Rightarrow $ $18$ Electron diamagnetic.
$\text{O}_{3} \Rightarrow $ $24$ Electron diamagnetic.
$N_{2}O$ ⇒ $22$ Electron diamagnetic.
Solution
$\text{O}_{2}^{-} \Rightarrow $ $17$ Electrons one unpaired electron as per MOT. Hence, it is paramagnetic