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NEETChemistryd and f Block Elements

Although Cr 3+ and Co 2+ ions have the same number of unpaired electrons, the magnetic moment of Cr 3+ is 3.87 B.M. and that of Co 2+ is 4.87 B.M. Why?

Options

  1. ACr 3+ has a higher nuclear charge than Co 2+ .
  2. BCo 2+ has a higher spin multiplicity than Cr 3+ .
  3. CCo 2+ has a larger ionic radius than Cr 3+ .
  4. DCr 3+ has a more stable electronic configuration.

Correct answer

C. Co 2+ has a larger ionic radius than Cr 3+ .

Step-by-step solution

Correct Option is : (C) Co 2+ has a larger ionic radius than Cr 3+ .

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