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JEE Main2014ChemistryClassification of Elements and Periodicity in PropertiesActual

Which one of the following has largest ionic radius ?

Options

  1. AF -
  2. BB 3 +
  3. CO 2 -
  4. DLi +

Correct answer

C. O 2 -

Step-by-step solution

With increase in +ve charge, size of cation decreases. With increase in -ve charge, size of anion increases. Across the period, ionic size, decreases. So correct order is B 3 +   <     Li +   <   F -   <   O 2 -

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