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NTA Abhyas JEE Main2020ChemistryClassification of Elements and Periodicity in PropertiesPractice

Incorrect order of radius is

Options

  1. AS r 2 + < R b + < B r - < S e 2 -
  2. BN b 5 + < Z r 4 + < Y 3 +
  3. CC o > C o 2 + > C o 3 + > C o 4 +
  4. DBa 2+ &#x2004; &#x003E; &#x2004; Cs + &#x2004; &#x003E; &#x2004; Se 2 &#x2212; &#x2004; &#x003E; &#x2004; As 3

Correct answer

D. Ba 2+ &#x2004; &#x003E; &#x2004; Cs + &#x2004; &#x003E; &#x2004; Se 2 &#x2212; &#x2004; &#x003E; &#x2004; As 3

Step-by-step solution

In A and B use (z/e) concept for isoelectronic species. In C size of neutral atom is greater than its cation.

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