Which of the following species contains only | vedclass

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(B) According to Molecular Orbital Theory $(M.O.T.)$,the electronic configuration of $B_2$ is $\sigma 1s^2, \sigma^* 1s^2, \sigma 2s^2, \sigma^* 2s^2,

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$B_2$

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(B) According to Molecular Orbital Theory $(M.O.T.)$,the electronic configuration of $B_2$ is $\sigma 1s^2, \sigma^* 1s^2, \sigma 2s^2, \sigma^* 2s^2, \pi 2p_x^1, \pi 2p_y^1$.In $B_2$,the bond order is $1$,and the bond is formed by the overlap of $2p$ orbitals,which is a $\pi$-bond.Since $B_2$ has two unpaired electrons in the $\pi 2p$ orbitals,it is paramagnetic.$C_2$ has a bond order of $2$ (both $\pi$-bonds) but is diamagnetic.${O_2}^-$ has both $\sigma$ and $\pi$ bonds and is paramagnetic.$N_2$ has one $\sigma$ and two $\pi$ bonds and is diamagnetic.Therefore,$B_2$ is the correct species.

Column $I$	Column $II$
$(A)$ $B_2$	$(p)$ Paramagnetic
$(B)$ $N_2$	$(q)$ Undergoes oxidation
$(C)$ $O_2^{-}$	$(r)$ Undergoes reduction
$(D)$ $O_2$	$(s)$ Bond order $\geq 2$
	$(t)$ Mixing of '$s$' and '$p$' orbitals

Which of the following species contains only $\pi$-bonds but exhibits paramagnetic nature?

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