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JEE Main Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main

The correct order of ionic radius is

Answer: (D)

Solution

and are formed from the same element, but has had two more electrons removed, giving it a higher effective nuclear charge per remaining electron and hence a smaller radius than . This makes a correct statement. Checking the others: and are

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Question ID VK-133329