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JEE Main Chemistry question

ChemistryChemical Bonding and Molecular StructureJEE Main

How many of the following species contain unpaired electron(s)?

Answer: 4

Solution

(11 valence e-, 1 unpaired), (3 e-, 1 unpaired), (7 valence e-, , 1 unpaired) and (6 valence e-, , 2

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Question ID VK-156900