Which of the following set of ions act as oxidising agents?
- Ce4+ and Tb4+
- La3+ and Lu3+
- Eu2+ and Yb2+
- Eu2+ and Tb4+
The Correct Option is A
Solution and Explanation
Oxidizing agents readily accept electrons and get reduced. Let's consider the common oxidation states of the given lanthanides:
- Ce: Common oxidation states are +3 and +4. Ce4+ readily accepts an electron to become Ce3+, acting as an oxidizing agent.
- Tb: Common oxidation states are +3 and +4. Tb4+ can be reduced to Tb3+, acting as an oxidizing agent.
La and Lu: These lanthanides predominantly exist in the +3 oxidation state and are not strong oxidizing agents.
Eu and Yb: These lanthanides exhibit +2 and +3 oxidation states. Eu2+ and Yb2+ are reducing agents (they tend to lose electrons and get oxidized).
Therefore, only Ce4+ and Tb4+ from the given options are good oxidizing agents.
Top Questions on Redox reactions
- Benzene on reaction with benzoyl chloride in the presence of anhydrous \(\mathrm{AlCl}_3\) forms:
- UPCATET - 2025
- Chemistry
- Redox reactions
- In the balanced redox reaction \(\mathrm{Cr}_2\mathrm{O}_7^{2-} + \mathrm{SO}_3^{2-} \longrightarrow \mathrm{Cr}^{3+} + \mathrm{SO}_4^{2-}\), the ratio of the number of \(\mathrm{Cr}_2\mathrm{O}_7^{2-}\) ions to \(\mathrm{SO}_4^{2-}\) ions is:
- UPCATET - 2025
- Chemistry
- Redox reactions
- What is the color of the flame produced when Magnesium (Mg) is burned in air?
- BCECE - 2025
- Chemistry
- Redox reactions
- What will be formed from the reaction: NaOH + Zn $\rightarrow$ ?
- BCECE - 2025
- Chemistry
- Redox reactions
- What is deposited on the walls after whitewashing?
- BCECE - 2025
- Chemistry
- Redox reactions
Questions Asked in NEET exam
- A photon and an electron (mass \(m\)) have the same energy \(E\). The ratio \( \frac{\lambda_{\text{photon}}}{\lambda_{\text{electron}}} \) of their de Broglie wavelengths is: (\(c\) is the speed of light)
- NEET (UG) - 2025
- Dual nature of radiation and matter
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :
- NEET (UG) - 2025
- Pendulums
- De-Broglie wavelength of an electron orbiting in the \(n = 2\) state of hydrogen atom is close to (Given Bohr radius = 0.052 nm):
- NEET (UG) - 2025
- de broglie hypothesis
- The plates of a parallel plate capacitor are separated by d. Two slabs of different dielectric constant \(K_1\) and \(K_2\) with thickness \(d/2\) and \(d/2\) respectively are inserted in the capacitor. Due to this, the capacitance becomes two times larger than when there is nothing between the plates. If \(K_1 = 1.25 K_2\), the value of \(K_2\) is :
- NEET (UG) - 2025
- Capacitors and Capacitance
- A wire of resistance \(R\) is cut into 8 equal pieces. From these pieces, two equivalent resistances are made by adding four of these together in parallel. Then these two are added in series. The net effective resistance of the combination is:
- NEET (UG) - 2025
- Resistance