Which of the following is paramagnetic-

1.	Which of the following is paramagnetic-
Answer» `CN^(-)` `NO^(+)` `CO` `CO_(2)^(-)` Solution :MO electronic configuration of `O_(2)^(-)(17)`: `K K(sigma_(2S))^(2)(sigma_(2s)^())^(2)(sigma_(2p_(z)))^(2)(pi_(2p_(x)))^(2)(pi2_(p_(y)))^(2)(pi_(2p_(x))^())^(2)(pi_(2p_(y))^(**))^(1)` OWING to the presence of one UNPAIRED electron, it is paramagnetic in nature.

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