Which one of the following is paramagnetic?

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Question

(B) Paramagnetic substances contain one or more unpaired electrons.According to Molecular Orbital Theory $(MOT)$:$N_2$ (total $14$ electrons): $({\sig

Vedclass · Accepted Answer

$NO$

Vedclass · Answer

(B) Paramagnetic substances contain one or more unpaired electrons.According to Molecular Orbital Theory $(MOT)$:$N_2$ (total $14$ 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.$NO$ (total $15$ electrons): $({\sigma}1s)^2 ({\sigma}^*1s)^2 ({\sigma}2s)^2 ({\sigma}^*2s)^2 ({\sigma}2p_z)^2 ({\pi}2p_x)^2 ({\pi}2p_y)^2 ({\pi}^*2p_x)^1$. It has one unpaired electron in the antibonding ${\pi}^*$ orbital,so it is paramagnetic.$CO$ (total $14$ electrons): Similar to $N_2$,it is diamagnetic.$O_3$ (total $24$ electrons): It is a diamagnetic molecule.Therefore,$NO$ is the correct answer.

List-$I$	List-$II$
$(1)$ ${\rm{NO}}$	$(A)$ $1.5$
$(2)$ ${\rm{CO}}$	$(B)$ $2.0$
$(3)$ ${\rm{O}}_2^-$	$(C)$ $2.5$
$(4)$ ${\rm{O}}_2$	$(D)$ $3.0$

Similar Questions

In which of the following molecules would you expect the nitrogen-to-nitrogen bond length to be the shortest?

Match the species given in List-$I$ with their bond orders given in List-$II$.

List-$I$ List-$II$

$(1)$ ${\rm{NO}}$ $(A)$ $1.5$

$(2)$ ${\rm{CO}}$ $(B)$ $2.0$

$(3)$ ${\rm{O}}_2^-$ $(C)$ $2.5$

$(4)$ ${\rm{O}}_2$ $(D)$ $3.0$

In which of the following ionization processes,the bond order has increased and the magnetic behaviour has changed?

Which of the following pairs of species are paramagnetic?

Which of the following has two nodal planes?

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