A) \[He_{2}^{+}\]
B) H2
C) \[H_{2}^{+}\]
D) \[H_{2}^{-}\]
Correct Answer: B
Solution :
\[\begin{matrix} {} & He_{2}^{+} & {{H}_{2}} & H_{2}^{+} & H_{2}^{-} \\ \sigma (1s) & \underline{\uparrow \downarrow } & \underline{\uparrow \downarrow } & \underline{\uparrow \,} & \underline{\uparrow \downarrow } \\ \overset{*}{\mathop{\sigma }}\,(1s) & \underline{\uparrow \,} & \underline{\,\,\,\,} & \underline{\,\,\,\,} & \underline{\uparrow \,} \\ B.O. & \frac{1}{2} & 1 & \frac{1}{2} & \frac{1}{2} \\ \begin{align} & \text{Magnetic} \\ & \text{nature} \\ \end{align} & \text{P} & \text{D} & \text{P} & \text{P} \\ \end{matrix}\] (P = Paramagnetic, D = Diamagnetic)
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