COMEDK · Chemistry · 23. d and f Block Elements
Which of the following forms a colourless solution in aqueous medium?
@@
- A \(\mathrm{Ti}^{3+}\)
- B \(\mathrm{Sc}^{3+}\)
- C \(\mathrm{V}^{3+}\)
- D \(\mathrm{Cr}^{3+}\)
Answer & Solution
Correct Answer
(B) \(\mathrm{Sc}^{3+}\)
Step-by-step Solution
Detailed explanation
The electronic configuration of \(\mathrm{Sc}\) is \(1 s^{8} 2 s^{8} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{1} 4 s^{2}\) Electronic configuration of Sc \({ }^{3+}\) is \(1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}\). \(\mathrm{So}, \mathrm{Sc}^{3+}\) is colourless due to the absence of…
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
- Arrangement of following compounds based on their boiling points in the increasing order. \(n\)-butane, 1-butanol, ethoxyethane and 1-propanol will beCOMEDK 2014 Medium
- The highest magnetic moment is shown by the transition metal ion with the configurationCOMEDK 2018 Easy
- Which of the following is highly basic?COMEDK 2022 Medium
- The product formed when hydroxylamine condenses with a carbonyl compound is calledCOMEDK 2020 Medium
- Two liquids A and B form an ideal solution. At 300 K , the vapour pressure of pure A and pure B are \(8 \times 10^3 \mathrm{~Pa}\) and \(12 \times 10^3 \mathrm{~Pa}\) respectively. If the solution has 40 mole percent of \(A\), the composition of \(A\) and \(B\) in the vapour phase is:COMEDK 2025 Medium
- Match the structures in Column I with their correct IUPAC names given in Column II.
COMEDK 2025 Medium
More PYQs from COMEDK
- When \(9.2 \times 10^{-3} \mathrm{~kg}\) of formic acid is added to 600 ml of water the freezing point of water is depressed. If \(30 \%\) of Formic acid undergoes dissociation what would be the freezing point of the solution? ( \(\mathrm{K}_{\mathrm{f}}\) of \(\mathrm{H}_2 \mathrm{O}\) is \(1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol} ; \mathrm{MM}\) of formic acid: 46 amu )COMEDK 2025 Medium
- The angle between hands of a clock when the time is \(4.25 \mathrm{AM}\) is signed toCOMEDK 2018 Easy
- To a fish under water, viewing obliquely, a fisherman standing on the bank of a lake looksCOMEDK 2024 Easy
- An object of mass \(3\text{ kg}\) moves due to an applied constant force such that its position along X axis is given by \(x = \dfrac{t^{\mathrm{2}}}{3}\) where \(x\) is in meters and \(t\) in seconds. The work done in 1 second isCOMEDK 2024 Medium
- A partiele exeeutes a linear SHM with an amplitude of \(4 \mathrm{~cm}\). At the mean position the velocity of the particle is \(10 \mathrm{~cm} / \mathrm{s}\). What is the displacement of the particle when its speed becomes \(5 \mathrm{~cm} / \mathrm{s}\) ?COMEDK 2020 Hard
- Which of the following statements is CORRECT:
A. Paramagnetic property is an intrinsic property of the material that arises due to the presence of completely filled electron shells and does NOT depend on temperature.
B. Diamagnetic materials move from a region of weak magnetic field to strong magnetic field
C. Diamagnetic materials have negative magnetic susceptibility which means that they oppose the applied magnetic field
D. Paramagnetic materials have negative magnetic susceptibility which means that they oppose the applied magnetic fieldCOMEDK 2025 Medium