Which of the following is correctly based on molecular orbital theory for peroxide ion?

Options

A. Its bond order is two and it is diamagnetic
B. Its bond order is one and is paramagnetic
C. Its bond order is two and it is paramagnetic
D. Its bond order is one and it is diamagnetic

Answer

D

Explanation

Molecular orbital configuration of peroxide `O_2^(2-):sigma_(1s)^2 sigma_(1s)^(**2)sigma_(2s)^2 sigma_(2s)^(**2)sigma_(2pz)^2 sigma_(2px)^2 sigma_(2py)^2pi_(2px)^(**2) pi_(2py)^(**2)`
Bond order =`1/2`(10-8)=1
It is diamagnetic