Question

Which of the following statement is wrong regarding Lanthanoids?

• A. The ionic size of Ln(III) ions decreases with increasing atomic number
• B. Ln(III) hydroxides are mainly basic in nature
• C. Ln(III) compounds are predominantly ionic in character
• D. Ln(III) compounds are generally colourless

Answer 1

Answer: (D)

Ln(III) compounds are generally colourless

Ln(III) compounds are generally coloured as they contain unpaired electrons in 4f and 5d subshells.