See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

     2 * 2 2 * 2 2 2 2 2 1 2 z x y x y O 17e 1s 1s 2s 2s 2p 2p 2p * 2p * 2p           Thus, 2 O has one unpaired electron; hence it is paramagnetic. Other species have no unpaired electron. All of them have 14 electrons.