Which o f the following species is not paramagnetic ?

1.	Which o f the following species is not paramagnetic ?
Answer» NO CO `O_(2)` `B_(2)` SOLUTION :CO Total number of electrons in CO = 6 + 8 = 14 THEREFORE molecular ELECTRONIC CONFIGURATION = `sigma 1s^(2), sigma^() 1s^(2), sigma 2s^(2), sigma^() 2s^(2) (pi 2p_(x)^(2)= pi 2p_(y)^(2)) sigma 2P_(2)^(2)` Therefore all the electrons are paired, So it is diamagnetic rest of all have minimum ONE electron is unpaired

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