Question

Oxygen molecule is paramagnetic in nature . What is the paramagnetic content in terms of magnetic moment is `O_(2)^(-)` ?
A. `1.732`
B. 3
C. `1.5`
D. `2.5`

Answer 1

Correct Answer - A
`O_(2)^(-): (sigma1s^(2))(sigma^(**)1s^(2))(sigma2s^(2))(sigma^(**)2s^(2))(sigma2p_(z)^(2))(pi2p_(x)^(2)=pi2p_(y)^(2))(pi^(**)2p_(x)^(2)=pi^(**)2p_(y)^(1))`
`O_(2)^(-)` has 1 unpaired electron.
`mu = sqrt(n(n+2))B.M. = sqrt(1(1+2)) = sqrt3 = 1.732 ` B.M.