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(A) The bond order $(BO)$ and magnetic behavior for the given transformations are as follows:$1$. $C_2^+ (BO = 1.5, 	ext{Paramagnetic}) 	o C_2 (BO =

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$C_2^+ 	o C_2$

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(A) The bond order $(BO)$ and magnetic behavior for the given transformations are as follows:$1$. $C_2^+ (BO = 1.5, 	ext{Paramagnetic}) 	o C_2 (BO = 2, 	ext{Diamagnetic})$. Here,$BO$ increases and magnetic behavior changes.$2$. $NO^+ (BO = 3, 	ext{Diamagnetic}) 	o NO (BO = 2.5, 	ext{Paramagnetic})$. Here,$BO$ decreases.$3$. $O_2 (BO = 2, 	ext{Paramagnetic}) 	o O_2^+ (BO = 2.5, 	ext{Paramagnetic})$. Here,$BO$ increases but magnetic behavior remains the same.$4$. $N_2 (BO = 3, 	ext{Diamagnetic}) 	o N_2^+ (BO = 2.5, 	ext{Paramagnetic})$. Here,$BO$ decreases.Therefore,the correct transformation is $C_2^+ 	o C_2$.

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

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