D and F Block Elements is a Class 12 Chemistry chapter that carries about 3.4% of the Chemistry questions in NEET. Practise it with 44 questions covering 2 topics, each with an explanation.
Sets of 15 questions that adapt to your level, with an explanation for every answer.
Across the 13 previous year papers, D and F Block Elements had 22 questions, about 1.7 a year. The most in one paper was 3, in NEET 2023.
| Paper | Questions from this chapter |
|---|---|
| NEET 2026 | 2 |
| NEET 2025 | 1 |
| NEET 2024 | 3 |
| NEET 2023 | 3 |
| NEET 2022 | 1 |
| NEET 2021 | 2 |
| NEET 2020 | 2 |
| NEET 2019 | 1 |
| NEET 2018 | 2 |
| NEET 2017 | 1 |
| NEET 2016 | 1 |
| Re-AIPMT 2015 | 1 |
| AIPMT 2014 | 2 |
8 questions from the practice bank, spread across the chapter's topics. The full set is in the app.
In the 3d series, Cr²⁺ is a strong reducing agent whereas Cr³⁺ is stable because Cr³⁺ has:
Answer: B. a half-filled t₂g³ configuration, which is especially stable
Why: Cr²⁺ is oxidised to the stable Cr³⁺.
Lanthanoid contraction refers to the:
Answer: B. steady decrease in atomic/ionic radii across the lanthanoid series
Why: Poor shielding by 4f electrons causes a steady decrease in atomic and ionic radii across the lanthanoid series.
The spin-only magnetic moment of Ni²⁺ (3d⁸) is:
Answer: B. 2.83 BM
Why: There are two unpaired electrons: √(2 × 4).
Compared with the lanthanoids, the actinoids show:
Answer: B. a greater range of oxidation states, and all are radioactive
Why: The 5f, 6d and 7s energies are close together.
Transition metals and their compounds are good catalysts, and the contact process for SO₃ uses:
Answer: A. V₂O₅
Why: Fe is used in the Haber process and Ni in hydrogenation.
One consequence of lanthanoid contraction is that the atomic radii of the second and third transition series elements in the same group are:
Answer: B. nearly identical
Why: Lanthanoid contraction causes the elements following the lanthanides (third transition series) to have atomic radii very similar to their second-series counterparts, despite the extra shell of electrons.
The Ziegler–Natta catalyst, used for polymerising ethene, is:
Answer: D. TiCl₄ with Al(C₂H₅)₃
Why: It gives high-density polyethylene.
The actinoid contraction is greater than the lanthanoid contraction because:
Answer: A. 5f electrons shield the nuclear charge even less effectively than 4f electrons
Why: The 5f orbitals extend further out into space.
D and F Block Elements carries about 3.4% of the Chemistry questions in NEET. Across the 13 previous year papers on NeetVictory it appeared 22 times, about 1.7 questions a year.
D and F Block Elements is a Class 12 Chemistry chapter in the NCERT syllabus.
NeetVictory has 44 practice questions on D and F Block Elements, each with an explanation, in sets of 15 that adapt to your level. This page shows a free sample.
NeetVictory