1.

`O_2` molecule isA. ferrimagneticB. ferromagneticC. paramagneticD. diamagnetic

Answer» Correct Answer - C
`O_(2), sigma 1s^(2),sigma^(**),1s^(2),sigma 2s^(2) sigma^(**) 2s^(2), sigma 2p_(z)^(2), pi2p_(xx)^(2), pi2p_(y)^(2), pi^(**)2p_(x)^(1), pi^(**) 2p_(y)^(-1)` Since `O_2`, molecule has two unpaired electrons, therefore, it is paramagnetic.


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