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(D) To determine the paramagnetic nature,we use Molecular Orbital Theory $(MOT)$ to find the number of unpaired electrons:$1. B_{2} (10 \ e^-): (\sigm

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$4$

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(D) To determine the paramagnetic nature,we use Molecular Orbital Theory $(MOT)$ to find the number of unpaired electrons:$1. B_{2} (10 \ e^-): (\sigma 1s)^2 (\sigma^* 1s)^2 (\sigma 2s)^2 (\sigma^* 2s)^2 (\pi 2p_x)^1 (\pi 2p_y)^1$ ($2$ unpaired electrons,paramagnetic)$2. Li_{2} (6 \ e^-): (\sigma 1s)^2 (\sigma^* 1s)^2 (\sigma 2s)^2$ ($0$ unpaired electrons,diamagnetic)$3. C_{2} (12 \ e^-): (\sigma 1s)^2 (\sigma^* 1s)^2 (\sigma 2s)^2 (\sigma^* 2s)^2 (\pi 2p_x)^2 (\pi 2p_y)^2$ ($0$ unpaired electrons,diamagnetic)$4. C_{2}^{-} (13 \ e^-): (\sigma 1s)^2 (\sigma^* 1s)^2 (\sigma 2s)^2 (\sigma^* 2s)^2 (\pi 2p_x)^2 (\pi 2p_y)^2 (\sigma 2p_z)^1$ ($1$ unpaired electron,paramagnetic)$5. O_{2}^{2-} (18 \ e^-): (\sigma 1s)^2 (\sigma^* 1s)^2 (\sigma 2s)^2 (\sigma^* 2s)^2 (\sigma 2p_z)^2 (\pi 2p_x)^2 (\pi 2p_y)^2 (\pi^* 2p_x)^2 (\pi^* 2p_y)^2$ ($0$ unpaired electrons,diamagnetic)$6. O_{2}^{+} (15 \ e^-): (\sigma 1s)^2 (\sigma^* 1s)^2 (\sigma 2s)^2 (\sigma^* 2s)^2 (\sigma 2p_z)^2 (\pi 2p_x)^2 (\pi 2p_y)^2 (\pi^* 2p_x)^1$ ($1$ unpaired electron,paramagnetic)$7. He_{2}^{+} (3 \ e^-): (\sigma 1s)^2 (\sigma^* 1s)^1$ ($1$ unpaired electron,paramagnetic)Thus,the paramagnetic species are $B_{2}, C_{2}^{-}, O_{2}^{+},$ and $He_{2}^{+}$. The total count is $4$.

The number of paramagnetic species among the following is $......$
$B_{2}, Li_{2}, C_{2}, C_{2}^{-}, O_{2}^{2-}, O_{2}^{+},$ and $He_{2}^{+}$

Similar Questions

During the change of $O_2$ to $O_2^-$ ion,the electron adds to which one of the following orbitals?

Bond order is an inverse measure of

Match the following molecules/ions in List-$I$ with their respective bond orders in List-$II$:
| List-$I$ (Molecules/ions) | List-$II$ (Bond order) |
| :--- | :--- |
| $A. N_2^+$ | $I. 1.0$ |
| $B. CO$ | $II. 1.5$ |
| $C. O_2$ | $III. 2.0$ |
| $D. O_2^-$ | $IV. 2.5$ |
| | $V. 3.0$ |

Which of the following is paramagnetic?

The bond order in $O_2^+$ is

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The number of paramagnetic species among the following is $......$$B_{2}, Li_{2}, C_{2}, C_{2}^{-}, O_{2}^{2-}, O_{2}^{+},$ and $He_{2}^{+}$