MHT CET Chemistry question

Knowing that the chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements is INCORRECT? [AIEEE 2009]

(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
(C)Ln (III) compounds are generally colourlessCorrect
(D)Ln (III) hydroxides are mainly basic in character

Answer: (C)

Solution

Most Ln(III) compounds are coloured owing to f-f transitions (only La3+, Lu3+, Ce3+ etc. are

Create a free account to read the complete working, and practise questions like this in a timed test.

Question ID VK-074776