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AP EAMCET202124 Aug 2021Morning ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

Which of the following sequences is the correct order of the size of species?

Options

  1. A>I⁺>I⁻
  2. BI ⁻> I ⁺> I ⁻
  3. C1⁺>I⁻>I⁻
  4. DI⁻>I^ >I⁺

Correct answer

D. I⁻>I^ >I⁺

Step-by-step solution

For a particular element, the order of size of anion, cation and neutral species is anion > element > cation. Cation has smallest size due to greater (Z_ eff ) effective nuclear charge. Size is inversely proportional to Z_ eff , which is directly proportional to positive charge. Thus, I ⁻> I > I ⁺ .

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