MolSynapsequestion bank

MolSynapse / Question bank / Chemical Bonding / Molecular orbital theory

JEE Main levelSingle correct optionDifficulty 2 of 3cb125

The number of unpaired electrons in the superoxide ion $O X_{2} X^{-}$ is

A0
B3
C2
D1

Answer: D

O X_{2} X^{-}

has 13 valence electrons. The

π^{*} 2 p_{x}

and

π^{*} 2 p_{y}

orbitals hold three electrons in total:

(π^{*} 2 p_{x})^{2} (π^{*} 2 p_{y})^{1}

, leaving one unpaired electron.

Practice Chemical Bonding More on Molecular orbital theory

Previous questionNext question

More questions on Molecular orbital theory

Which of the following species has a bond order of 3 according to MO theory? JEE Main level
Which statement about B2 and C2 is correct according to MO theory? JEE Main level
On converting N2 to N2^+, the bond length and magnetic behaviour change as JEE Main level
Which species has the highest bond dissociation energy? JEE Main level
In which of the following molecules does the sigma 2p_z molecular orbital lie higher in energy than the pi 2p_x and pi 2p_y orbitals? JEE Main level
The correct order of N-O bond length in NO^+, NO and NO^- is JEE Main level