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JEE Main 202131 AugustMorning Shift
Exam
JEE Main
Year
2021
Date
31 August
Shift
Morning Shift
Subject
Chemistry
Chapter
d and f Block Elements

JEE Main 2021 · 31 August · Morning Shift · Chemistry · d and f Block Elements

Which one of the following lanthanides exhibits + 2 oxidation state...

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

Options

  1. ANdNd
  2. BYbYb
  3. CCeCe
  4. DLaLa

Correct answer

B. YbYb

Step-by-step solution

La2+(Z=57)=5d1{La}^{2 +}\left(Z = 57\right) = 5{d}^{1}
Ce2+(Z=58)=4f2{Ce}^{2 +}\left(Z = 58\right) = 4{f}^{2}
Nd2+(Z=60)=4f4{Nd}^{2 +}\left(Z = 60\right) = 4{f}^{4}
Yb2+(Z=70)=4f14{Yb}^{2 +}\left(Z = 70\right) = 4{f}^{14}
Yb2+{Yb}^{2 +} Contain no unpaired electron. So it is diamagnetic and Colourless.
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