COMEDK · Chemistry · 23. d and f Block Elements
A transition metal ion exists in its highest oxidation state. It is expected to behave as
- A a chelating agent
- B a central metal, in a coordination compound
- C an oxidising agent
- D a reducing agent
Answer & Solution
Correct Answer
(C) an oxidising agent
Step-by-step Solution
Detailed explanation
If a transition metal ion exists in its highest oxidation state, then it behave as oxidising agent. The oxidation number of metal can only decrease from its highest oxidation number i.e. it will undergoes reduction and oxidise other element.
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
- What volume of \(0.2 \mathrm{~M}\) Acetic acid is to be added to \(100 \mathrm{ml}\) of \(0.4 \mathrm{M}\) Sodium acetate so that a Buffer solution of \(\mathrm{pH}\) equal to 4.94 is obtained? \((\mathrm{pK}_{\mathrm{a}}\) of \(\mathrm{CH}_3 \mathrm{COOH}=4.76)\)COMEDK 2024 Medium
- In the manufacture of ammonia by the Haber's process, \(\mathrm{N}_{2}(g)+3 \mathrm{H}_{2}(g) \rightleftharpoons 2 \mathrm{NH}_{3}(g)+92.3 \mathrm{~kJ}\), which of the following conditions is unfavourable?COMEDK 2016 Medium
- Find the correct matches.
\(\begin{array}{|l|l|l|l|} \hline \text{A} & \mathrm{Cr}_2 \mathrm{O}_7^{2-} & \mathrm{P} & \text{is predominantly a basic compound.} \\ \hline \text{B} & \mathrm{FeCr}_2 \mathrm{O}_4 & \mathrm{Q} & \text{is predominantly an acidic compound.} \\ \hline \text{C} & \mathrm{CrO}_3 & \mathrm{R} & \text{forms yellow chromate on reaction with } \mathrm{Na}_2 \mathrm{CO}_3 \text{ in air.} \\ \hline \text{D} & \mathrm{CrO} & \mathrm{S} & \text{is interconvertible with } \mathrm{MO}_4^{2-} \text{ depending on the pH of the medium.} \\ \hline \end{array}\)COMEDK 2025 Medium - \(1 \mathrm{~cm}^3 \text { of } 0.01 \mathrm{~M} \mathrm{~HCl} \text { is added to } 1 \mathrm{~L} \text { of } \mathrm{NaCl} \text { solution. The } \mathrm{pH} \text { of the resulting solution is: }\)COMEDK 2024 Medium
- When phenol is treated with chloromethane in presence of \(\mathrm{AlCl}_{3}\) we getCOMEDK 2019 Medium
- Choose the group of ions / molecules in which none of the species undergo Disproportionation reaction.COMEDK 2024 Medium
More PYQs from COMEDK
- \(n\)-propyl bromide on treating with alcoholic \(\mathrm{KOH}\) producesCOMEDK 2017 Easy
- Two physical quantities having the same dimensional formula \(\left[\mathrm{M}^1 \mathrm{~L}^{-1} \mathrm{~T}^{-2}\right]\) areCOMEDK 2025 Easy
- Given, the positive integers \(r>1, n>2\) and the coefficients of \((3 r)\) th and \((r+2)\) th terms in the expansion of \((1+x)^{2 n}\) are equal, then \(n=\)COMEDK 2017 Hard
- A beam of light of wavelength \(600 \mathrm{~nm}\) from a distant source falls on a single slit \(1 \mathrm{~mm}\) wide and the resulting diffraction pattern is observed on a screen \(2 \mathrm{~m}\) away. The distance between the first dark fringes on either side of the central bright fringe isCOMEDK 2019 Hard
- Point charge \(\sqrt{2}C, \sqrt{2}C\), and \(-2C\) are placed at the three vertices of a right-angled triangle in air. [as shown in the figure below] What is the electric field at a point P on the hypotenuse that is equidistant from all three charges. Given distances \(XP = YP = ZP = 0.5\ m\)
COMEDK 2026 Medium - The turning point of the function \(y=\dfrac{a x-b}{(x-1)(x-4)}\) at the point \(P(2,-1)\) isCOMEDK 2024 Medium