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JEE Main Chemistry question

ChemistryThe p-Block ElementsJEE Main

How many of the following make alkaline solution in water? O, O, O

Answer: 3

Solution

The oxide ion hydrolyses completely to give hydroxide, (strongly alkaline). The peroxide ion hydrolyses to give hydroxide (and HO), Missing superscript or subscript argument\text{O}_2^{2-}$ + 2H_2O

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Question ID VK-137284