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JEE Main Chemistry question

ChemistryThe p-Block ElementsJEE Main

In which of the following, unpaired electrons are present: KO_2, AlO_2^-, BaO_2, NO_2^+? **[MP PET 2003]**

Answer: (C)

Solution

is a superoxide, containing with one unpaired electron. is a peroxide (contains , all electrons paired),

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Question ID VK-156195