Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Open MARKS Web Download App
Search any question & find its solution
Question: Answered & Verified by Expert
Knowing that the chemistry of lanthanoids(Ln) is dominated by its +3 oxidation state, which of the following statements is incorrect?
Chemistryd and f Block ElementsBITSATBITSAT 2016
Options:
  • A The ionic size of Ln (III) decrease in general with increasing atomic number
  • B Ln (III) compounds are generally colourless.
  • C Ln (III) hydroxide are mainly basic in character.
  • D Because of the large size of the Ln (III) ions the bonding in its compounds is predominantly ionic in character.
Solution:
1901 Upvotes Verified Answer
The correct answer is: Ln (III) compounds are generally colourless.
Most of the $\mathrm{Ln}^{3+}$ compounds except $\mathrm{La}^{3+}$ and $\mathrm{Lu}^{3+}$ are coloured due to the presence of $f$ -electrons.

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.

Use on iOS or Desktop Download from Google Play