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QAIPMT-2010-Ch-2022: NEET 2010 Chemistry - Class 11 AIPMT-2010-Ch-2022 Solution: The correct order of the decreasing ionic radii among the…

The correct order of the decreasing ionic radii among the following isoelectronic species is

Multiple Choice Options

  • A Ca2+>K+>S2−>Cl−Ca^{2+}>K^+>S^{2-}>Cl^-
  • B Cl−>S2−>Ca2+>K+Cl^->S^{2-}>Ca^{2+}>K^+
  • C S2−>Cl−>K+>Ca2+S^{2-}>Cl^->K^+>Ca^{2+}
  • D K+>Ca2+>Cl−>S2−K^+>Ca^{2+}>Cl^->S^{2-}

Step-by-Step Verified Solution

For isoelectronic species, ionic radius increases when there is increase in negative charge. It happens because effective nuclear charge on the atom (Z eff ) decreases. Same when ionic radius decreases with increase in positive charge as Z eff increases.

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