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JEE Main202127 Aug 2021Evening ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

The correct order of ionic radii for the ions, P 3 - , S 2 - , Ca 2 + , K + , Cl - is :

Options

  1. AP 3 - > S 2 - > Cl - > K + > Ca 2 +
  2. BP 3 - > S 2 - > Cl - > Ca 2 + > K +
  3. CCl - > S 2 - > P 3 - > Ca 2 + > K +
  4. DK + > Ca 2 + > P 3 - > S 2 - > Cl -

Correct answer

A. P 3 - > S 2 - > Cl - > K + > Ca 2 +

Step-by-step solution

P 3 - S 2 - C - K + Ca 2 + Z 15 16 17 19 20 No . of   e - 18 18 18 18 18 For isoelectronic species greater is Z smaller is radius. So correct order P 3 - > S 2 - > Cl - > K + > Ca 2 +

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