BITSAT2016Chemistryd and f Block ElementsActual
Knowing that the chemistry of lanthanoids(Ln) is dominated by its +3 oxidation state, which of the following statements is incorrect?
Options
- AThe ionic size of Ln (III) decrease in general with increasing atomic number
- BLn (III) compounds are generally colourless.
- CLn (III) hydroxide are mainly basic in character.
- DBecause of the large size of the Ln (III) ions the bonding in its compounds is predominantly ionic in characte
Correct answer
B. Ln (III) compounds are generally colourless.
Step-by-step solution
Most of the Ln ³⁺ compounds except La ³⁺ and Lu ³⁺ are coloured due to the presence of f -electrons.