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JEE Main202226 Jun 2022Evening ShiftChemistryd and f Block ElementsActual

The most common oxidation state of Lanthanoid elements is + 3 . Which of the following is likely to deviate easily from + 3 oxidation state?

Options

  1. ACe At .   No , 58
  2. BLa At .   No , 57
  3. CLu At .   No , 71
  4. DGd At .   No , 64

Correct answer

A. Ce At .   No , 58

Step-by-step solution

Electronic configuration of Ce = Xe 4 f 1 5 d 1 6 s 2 ⏟ → − 4 e − Xe ⏟ Cerium in + 4 oxidation state due to stable xenon configuration. La ,   Lu   and   Gd are stable in +3 oxidation state.

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