Chemical Bonding And Molecular Structure Question 320
Question: Which one of the following species is diamagnetic in nature [AIEEE 2005]
Options:
A) $ He_2^{+} $
B) H2
C) $ H_2^{+} $
D) $ H_2^{-} $
Show Answer
Answer:
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} \\ Magnetic \\ nature \\ & P & D & P & P \\ \end{matrix} $ (P = Paramagnetic, D = Diamagnetic)
