Q83 / 200 · NEET 2021 · Chemistry

The incorrect statement among the following is:

  • A
    Actinoid contraction is greater for element to element than Lanthanoid contraction.
  • Correct answer
    B
    Most of the trivalent Lanthanoid ions are colorless in the solid state.
  • C
    Lanthanoids are good conductors of heat and electricity.
  • D
    Actinoids are highly reactive metals, especially when finely divided.

Solution

Most of the trivalent Lanthanoid ions are coloured in the solid state.

All other statements are correct.

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

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