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4. d and f- block elements — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry4. d and f- block elements1 Mark
MCQ
Which is not the correct Statement? (At. nos. $Ce = 58,\,Lu = 71,\,La = 57,\,Yb = 70$ )
  • ✓
    Colour of $Yb^{3+}$ ion is pink.
  • B
    $La^{3+}$ is diamagnetic.
  • C
    $Ce^{4+}$ has $f^o$ configuration.
  • D
    $Lu^{3+}$ had $f^{14}$ configuration.
✓

Answer

Correct option: A.
Colour of $Yb^{3+}$ ion is pink.
a
Option $(a)$ is incorrect as $Yb^{3+}$ is colorless.

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