Which one of the following molecules is expec | vedclass

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(B) According to Molecular Orbital Theory $(MOT)$, a molecule is diamagnetic if all its electrons are paired.For $C_2$ ($12$ electrons): $\sigma 1s^2,

Vedclass · Accepted Answer

$N_2$

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(B) According to Molecular Orbital Theory $(MOT)$, a molecule is diamagnetic if all its electrons are paired.For $C_2$ ($12$ electrons): $\sigma 1s^2, \sigma^* 1s^2, \sigma 2s^2, \sigma^* 2s^2, \pi 2p_x^2 = \pi 2p_y^2$. All electrons are paired, so it is diamagnetic.For $N_2$ ($14$ electrons): $\sigma 1s^2, \sigma^* 1s^2, \sigma 2s^2, \sigma^* 2s^2, \pi 2p_x^2 = \pi 2p_y^2, \sigma 2p_z^2$. All electrons are paired, so it is diamagnetic.For $O_2$ ($16$ electrons): The configuration ends with $\pi^* 2p_x^1 = \pi^* 2p_y^1$, having $2$ unpaired electrons, making it paramagnetic.For $S_2$ ($32$ electrons): Similar to $O_2$, it has $2$ unpaired electrons in the $\pi^*$ orbitals, making it paramagnetic.Note: Both $C_2$ and $N_2$ are diamagnetic. In many competitive exams, $N_2$ is the standard example for diamagnetism.

Which one of the following molecules is expected to exhibit diamagnetic behaviour?

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