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NEETChemistryd and f Block Elements

Which lanthanoid exhibits a slightly different Eo value for the half-reaction: Ln3+(aq) + 3e– → Ln(s)?

Options

  1. ALa
  2. BCe
  3. CEu
  4. DLu

Correct answer

C. Eu

Step-by-step solution

Values for Eo for the half-reaction: Ln3+(aq) + 3e– → Ln(s) are in the range of –2.2 to –2.4 V except for Eu for which the value is – 2.0 V.

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