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JEE Main202131 Aug 2021Morning ShiftChemistryd and f Block ElementsActual

Which one of the following lanthanides exhibits + 2 oxidation state with diamagnetic nature ? (Given Z for Nd = 60 , Yb = 70 , La = 57 , Ce = 58 )

Options

  1. ANd
  2. BYb
  3. CCe
  4. DLa

Correct answer

B. Yb

Step-by-step solution

La 2 + Z = 57 = 5   d 1 Ce 2 + Z = 58 = 4 f 2 Nd 2 + Z = 60 = 4 f 4 Yb 2 + Z = 70 = 4 f 14 Yb 2 + Contain no unpaired electron. So it is diamagnetic and Colourless.

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