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

લેન્થેનોઇડ શ્રેણીનો કયો સભ્ય દ્વિસંયોજક સ્વરૂપમાં સૌથી વધારે સ્થાયી છે ?

  1. A \(Ce\) (Atomic Number \(58\))
  2. B \(Sm\) (Atomic Number \(62\))
  3. C \(Eu\) (Atomic Number \(63\))
  4. D \(Yb\) (Atomic Number \(70\))
Verified Solution

Answer & Solution

Correct Answer

(C) \(Eu\) (Atomic Number \(63\))

Step-by-step Solution

Detailed explanation

\(E _{ M ^{3+} / M ^{2+}}^{0} \Rightarrow Eu(-0.35) Yb(-1.05\) Hence, due to more reduction potential in \(Eu\) as compared to \(Yb\), it can concluded that \(Eu ^{2+}\) is more stable than \(Yb ^{2+}\).
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