KCET · Chemistry · Structure of Atom
Which of the following statement is wrong regarding lanthanoids?
- A Ln(III) compounds are generallycolourless.
- B Ln(III) compounds are predominantly ionicin character.
- C The ionic size of \( \operatorname{Ln}( \) III \( ) \) ions decreaseswith increasing atomic number.
- D \( \operatorname{Ln}( \) III \( ) \) hydroxides are mainly basic in nature
Answer & Solution
Correct Answer
(A) Ln(III) compounds are generallycolourless.
Step-by-step Solution
Detailed explanation
Ln(III) ions are colored due to the presence of partly filled orbitals as a result it is possible to absorb certain
wavelengthfrom the visible region of the spectrum. Therefore, \( \operatorname{Ln}(I \mid I) \) compounds are generally colorless is a wrong
statement regarding lanthanoids.
wavelengthfrom the visible region of the spectrum. Therefore, \( \operatorname{Ln}(I \mid I) \) compounds are generally colorless is a wrong
statement regarding lanthanoids.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- Arrange the following compounds in their decreasing order of reactivity towards Nucleop addition reaction.
\(\mathrm{CH}_3 \mathrm{COCH}_3, \mathrm{CH}_3 \mathrm{COC}_2 \mathrm{H}_5, \mathrm{CH}_3 \mathrm{CHO}\)KCET 2025 Medium - The basic principle of Cottnell's precipitator isKCET 2008 Easy
- For the reaction \(\mathrm{Fe}_{2} \mathrm{O}_{3}+3 \mathrm{CO} \longrightarrow 2 \mathrm{Fe}+3 \mathrm{CO}_{2}\), the volume of carbon monoxide required to reduce one mole of ferric oxide isKCET 2008 Medium
- Match List-I with List-II
Choose the correct answer from the options given below.List-I (Vitamins) List-II (Deficiency Diseases) (a) \(\text{B}_1\) (i) Convulsions (b) \(\text{B}_2\) (ii) RBC deficiency in haemoglobin (c) \(\text{B}_6\) (iii) Retarded growth (d) \(\text{B}_{12}\) (iv) Burning sensation of the skin KCET 2026 Easy - Based on the first law of thermodynamics, which one of the following is correct?KCET 2011 Easy
- The reaction involved in the oil of winter green test is salicylic acid \(\mathrm{} \underset{\text { Conc. } \mathrm{H}_{2} \mathrm{SO}_{4}}{\stackrel{\Delta}{\longrightarrow}}\) product. The product is treated with \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) solution. The missing reagent in the above reaction isKCET 2009 Medium
More PYQs from KCET
- For a point object, which of the following always produces virtual image in air?KCET 2023 Easy
- If \(\mathrm{f}(\mathrm{x})=1+\mathrm{nx}+\frac{\mathrm{n}(\mathrm{n}-1)}{2} \mathrm{x}^{2}\) \(+\frac{n(n-1)(n-2)}{6} x^{3}+\ldots+x^{n}\)
then \(\mathrm{f}^{\prime \prime}(1)\) is equal toKCET 2009 Easy - Find out the wrong statement about angiosperm roots.KCET 2012 Medium
- To observe diffraction, the size of the obstacleKCET 2015 Medium
- Which of these is NOT an example for Adaptive radiation?KCET 2023 Hard
- A \(60 \mathrm{~W}\) source emits monochromatic light of wavelength \(662.5 \mathrm{~nm}\). The number of photons emitted per second isKCET 2023 Easy