KCET 2025 Chemistry Paper

To calculate bond order, we use the formula:
Bond order =‌

1

2

(number of bonding electrons - number of antibonding electrons)
Here's how the bond order is calculated for each molecule/ion:
For the NO molecule:
BO=‌

1

2

(8−3)=2.5
For the CO molecule:
BO=‌

1

2

(10−4)=3.0
For the O2−ion:
ВО=‌

1

2

(6−3)=1.5
For the O2 molecule:
BO=‌

1

2

(6−2)=2.0