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

Options

A. `C_(2)^(+) to C_(2)`
B. `NO^(-)to NO`
C. `O_(2) to O_(2)^(+)`
D. `N_(2) to N_(2)^(+)`

Answer

A

Explanation

`(a)underset(BO=1.5)underset("paramagnetic")(C_(2)^(+)) to underset(BO=2)underset("diamagnetic")(C_(2))` `(b)underset(BO=3)underset("diamagnetic")(NO^(-)) to underset(BO=2.5)underset("paramagnetic")(NO)` `(c)underset(BO=2)underset("Paramagnetic") (O_(2)) to underset(BO=2.5)underset("paramagnetic")(O_(2)^(+))` `(d) underset(BO=3)underset("diamagnetic")(N_(2)) to underset(BO=2.5)underset("paramagnetic")(N_(2)^(+))`