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JEE Main202331 Jan 2023Morning ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

The correct increasing order of the ionic radii is

Options

  1. ACl - < Ca 2 + < K + < S 2 -
  2. BK + < S 2 - < Ca 2 + < Cl -
  3. CS 2 - < Cl - < Ca 2 + < K +
  4. DCa 2 + < K + < Cl - < S 2 -

Correct answer

D. Ca 2 + < K + < Cl - < S 2 -

Step-by-step solution

For isoelectronic species, as nuclear charge increases radius decreases. Greater the positive charge, the lesser the size of the ion. Greater the negative charge, the larger the size of an ion.         Ca 2 + <   K +   <   Cl -   <   S 2 - p     20                   19               17                 16 e     18   &

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