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JEE Mains · Chemistry · STD 12 - 4. d and f- block elements

લેન્થેનોઈડના યુગ્મ (જોડીઓ) કે જેમાં બંને તત્વો વધારે (ઊંચી) તૃતિય-આયનીકરણ ઊર્જા ધરાવે છે.

  1. A \(Eu , Gd\)
  2. B \(Eu , Yb\)
  3. C \(Lu , Yb\)
  4. D \(Dy, Gd\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(Eu , Yb\)

Step-by-step Solution

Detailed explanation

\(\left.Eu ^{+2}:[ Xe ] 4 f ^7\right\}\) High IE due to half \(\left.Yb ^{+2}:[ Xe ] 4 f ^{14}\right\}\) filled \& fully filled configurations
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