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

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TestHub · Accepted Answer

On the basis of molecular orbital theory the value of bond order and magnetic nature can be given as
$\underset{\underset{P a r a m a g n e t i c}{B O = 1.5}}{C_{2}^{+}} \to \underset{\underset{D i a m a g n e t i c}{B O = 2}}{C_{2}}$
$\underset{\underset{D i a m a g n e t i c}{B O = 3}}{N O^{+}} \to \underset{\underset{P a r a m a g n e t i c}{B O = 2.5}}{N O}$
$\underset{\underset{P a r a m a g n e t i c}{B O = 2}}{O_{2}} \to \underset{\underset{P a r a m a g n e t i c}{B O = 2.5}}{O_{2}^{+}}$
$\underset{\underset{D i a m a g n e t i c}{B O = 3}}{N_{2}} \to \underset{\underset{P a r a m a g n e t i c}{B O = 2.5}}{N_{2}^{+}}$

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