For the four successive transition elements and , the stability of oxidation state will be there in which of the following order?
(At. no. )
- Fe > Mn > Co > Cr
- Co > Mn > Fe > C
- Cr > Mn > Co > Fe
- Mn > Fe > Cr > Co
The Correct Option is D
Solution and Explanation
Top Questions on d -and f -Block Elements
- Which of the following is correct statement?
- TS EAMCET - 2024
- Chemistry
- d -and f -Block Elements
- Which of the following does not exist?
- TS EAMCET - 2024
- Chemistry
- d -and f -Block Elements
- Define lanthanoid contraction. How does it affect the atomic radii of the third transition series and the second transition series?
- CBSE CLASS XII - 2024
- Chemistry
- d -and f -Block Elements
- Why do transition metals and their compounds act as good catalysts?
- CBSE CLASS XII - 2024
- Chemistry
- d -and f -Block Elements
- What is the cause of contraction in the atomic size of lanthanoids?
- CBSE CLASS XII - 2024
- Chemistry
- d -and f -Block Elements
Questions Asked in NEET exam
- Given below are two statements:
Statement I: Mitochondria and chloroplasts both double membranes bound organelles.
Statement II: Inner membrane of mitochondria is relatively less permeable, as compared chloroplast. I
In the light of the above statements, choose the mis appropriate answer from the options given below- NEET (UG) - 2024
- Cell structure and organelles
- Match List I with List II
List-I
(Reaction)List-II
(Reagents/Condition)(A) 
(I) 
(B) 
(II) CrO3 (C) 
(III) KMnO4/KOH, (D) 
(IV) (i) O3
(ii) Zn-H2O
Choose the correct answer from the options given below:- NEET (UG) - 2024
- Chemical Reactions
If the monochromatic source in Young's double slit experiment is replaced by white light,
1. There will be a central dark fringe surrounded by a few coloured fringes
2. There will be a central bright white fringe surrounded by a few coloured fringes
3. All bright fringes will be of equal width
4. Interference pattern will disappear- NEET (UG) - 2024
- Youngs double slit experiment
- Arrange the following elements in increasing order of electronegativity:
N, O, F, C, Si
Choose the correct answer from the options given below:- NEET (UG) - 2024
- Modern Periodic Law And The Present Form Of The Periodic Table
- The work done during reversible isothermal expansion of one mole of hydrogen gas at 25oC from a pressure of 20 atm to 10 atm is:
(Given R = 2.0 cal K-1 mol-1)- NEET (UG) - 2024
- Gas laws
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