Q1 / 90 · JEE Main 2009 · Chemistry

Knowing that the Chemistry of lanthanoids $(\operatorname{Ln})$ is dominated by its $+3$ oxidation state, which of the following statements in incorrect?

  • A
    Because of the large size of the Ln (III) ions the bonding in its compounds is predominantly ionic in character.
  • B
    The ionic sizes of Ln (III) decrease in general with increasing atomic number.
  • Correct answer
    C
    Ln (III) compounds are generally colourless.
  • D
    Ln (III) hydroxides are mainly basic in character.

Solution

$\mathrm{Ln}^{+3}$ compounds are mostly coloured.

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

Relevant Questions