Which of the following options with respect to increasing bond order is correct ?

Options

A. `NO lt C_(2) lt O_(2)^(-) lt B_(2)`
B. `C_(2) lt NO lt B_(2) lt O_(2)^(-)`
C. `B_(2) lt O_(2)^(-) lt NO lt C_(2)`
D. `B_(2) lt O_(2)^(-) lt C_(2) lt NO`

Answer

D

Explanation

`B_(2)` bond order `=(6-4)/(2)=1,O_(2)^(-)` bond order `=(10-7)/(2)=1.5`
`C_(2)` bond order `=(8-4)/(2)=2,NO` bond order `=(10-5)/(2)=2.5`