Q24 / 90 · JEE Main 2012 (07 May Online) · Chemistry

Which is not the correct Statement? (At. nos. $\mathrm{Ce}=58, \mathrm{Lu}=71, \mathrm{La}=57, \mathrm{Yb}=70$ )

  • Correct answer
    A
    Colour of $\mathrm{Yb}^{3+}$ ion is pink.
  • B
    $\mathrm{La}^{3+}$ is diamagnetic.
  • C
    $\mathrm{Ce}^{4+}$ has $f^0$ configuration.
  • D
    $\mathrm{Lu}^{3+}$ had $f^{14}$ configuration.

Solution

Option (a) is incorrect as $\mathrm{Yb}^{3+}$ is colorless.

Hence, the correct answer is option: 'A'.

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