Using MO theory, find the sum of the bond orders of O2-, O2^2-, N2+ and C2-. Give the answer to one decimal place.

JEE Advanced levelNumerical answerDifficulty 3 of 3cb110

Using MO theory, find the sum of the bond orders of $O X_{2} X^{-}$ , $O X_{2} X^{2 -}$ , $N X_{2} X^{+}$ and $C X_{2} X^{-}$ . Give the answer to one decimal place.

Numerical answer type, tolerance 0.05.

Valence electrons are 13, 14, 9 and 9.

O X_{2} X^{-}

(8 - 5) /2 = 1.5

O X_{2} X^{2 -}

(8 - 6) /2 = 1

N X_{2} X^{+}

and

C X_{2} X^{-}

each have 7 bonding and 2 antibonding electrons:

(7 - 2) /2 = 2.5

. Sum

= 1.5 + 1 + 2.5 + 2.5 = 7.5