The known oxidation states for both $V$ and $CO$ are
- +2, +3, +4, +5
- +2, +3, +4, +5, +6
- +2, +3, +4
- +2, +3
The Correct Option is A
Solution and Explanation
The variable oxidation states are due to the participation of $n s$ and $(n-1) d$ electrons in bonding,
${ }_{23} V$ shows $+2,+3,+4$, and $+5$ oxidation states
${ }_{27} C o$ shows $+2+3+4$ oxidation states.
Therefore, known oxidation states for both $V$ and $Co$ are
$+2,+3,+4$ and $+5$
Top Questions on d block elements
- The electronic configuration of Cu(II) is 3d9 whereas that of Cu(I) is 3d10. Which of the following is correct ?
- JEE Main - 2024
- Chemistry
- d block elements
- The correct statement(s) about the ligand substitution/exchange reaction is/are
- IIT JAM CY - 2024
- Inorganic Chemistry
- d block elements
- Among [Ti(H2O)6]3+,[NiCl4]2−,[CrO4]2−,and [Mn(H2O)6]2+, the complex that exhibits the largest molar absorptivity in the visible region of the electronic absorption spectrum is
- IIT JAM CY - 2024
- Inorganic Chemistry
- d block elements
- [Co(NH3)5(SO4)]Br and [Co(NH3)5Br]SO4 are examples of
- IIT JAM CY - 2024
- Inorganic Chemistry
- d block elements
- For the reaction shown below
![1/2 Mn2 (CO)10+Na Na[Mn(CO)5 ] CH3Cl-NaCl [CH3Mn(CO)5](https://images.collegedunia.com/public/qa/images/content/2024_07_31/image_a08f12a11722411541392.png)
the oxidation states of Mn in P and Q, respectively, are- IIT JAM CY - 2024
- Inorganic Chemistry
- d block elements
Questions Asked in AMUEEE exam
- The ratio of the half-life time $ (t_{1/2}) $ , to the three quarter life-time, $ (t_{3/4}) $ , for a reaction that is second order
- AMUEEE - 2018
- Order of Reaction
- $ 0.002\, M $ solution of a weak acid has an equivalent conductance $ (\wedge) 60\, ohm^{-1}\, cm^{2}\, eq^{-1} $ . What will be the $ pH $ ? (Given : $ \wedge = 400 \, ohm^{-1} \, cm^{2} \, eq^{-1} $ ]
- AMUEEE - 2018
- Electrochemistry
- The electrode potential, $ E^{\circ} $ , for the reduction of $ MnO^{-}_{4} $ to $ Mn^{2+} $ in acidic medium is $ +1.51\, V $ . Which of the following metal(s) will be oxidised? The reduction reactions and standard electrode potentials for $ Zn^{2+}, Ag^{+} $ , and $ Au^{+} $ are given as $ Zn^{2+} (aq) +2e \to Zn(s), E^{\circ} = -0.762\, V $ $ Ag+ (aq) +e {\rightleftharpoons} Ag (s), E^{\circ}=+0.80 \,V $ $ Au^{+} (aq) +e {\rightleftharpoons} Au(s), E^{\circ}+1.69\,V $
- AMUEEE - 2018
- Electrochemistry
- Three particles, two with masses $ m $ and one with mass $ M $ , might be arranged in any of the four configurations shown below. Rank the configurations according to the magnitude of the gravitational force on $ M $ , least to greatest
- AMUEEE - 2018
- Gravitation
- The $ EAN $ value $ y \left[Ti\left(\sigma-C_{6}H_{5}\right)_{2}\left(\pi-C_{5}H_{5}\right)_{2}\right]^{0} $ is
- AMUEEE - 2018
- coordination compounds
Concepts Used:
D and F Block Elements
The d-block elements are placed in groups 3-12 and F-block elements with 4f and 5f orbital filled progressively. The general electronic configuration of d block elements and f- block elements are (n-1) d 1-10 ns 1-2 and (n-2) f 1-14 (n-1) d1 ns2 respectively. They are commonly known as transition elements because they exhibit multiple oxidation states because of the d-d transition which is possible by the availability of vacant d orbitals in these elements.
They have variable Oxidation States as well as are good catalysts because they provide a large surface area for the absorption of reaction. They show variable oxidation states to form intermediate with reactants easily. They are mostly lanthanoids and show lanthanoid contraction. Since differentiating electrons enter in an anti-penultimate f subshell. Therefore, these elements are also called inner transition elements.
Read More: The d and f block elements