Chapter-wise NEET Mock Test for D and F Block Elements with Answers 2025
Key Concepts of D and F Block Elements for NEET 2025
Understanding the d and f block elements is vital for scoring well in the chemistry section of NEET. These elements, also referred to as transition and inner transition elements, bring unique properties like variable oxidation states, colored compounds, and formation of complex ions, which make them a regular feature in competitive exam papers.
The d-block consists of groups 3 to 12 and is positioned at the center of the periodic table. Elements such as iron, copper, nickel, and chromium show a wide range of chemical behavior. Meanwhile, the f-block elements, which include lanthanides and actinides, are placed separately at the bottom and showcase special characteristics such as lanthanide contraction and radioactivity in actinides.
D Block Elements: Electronic Configuration and Properties
D-block elements are identified by the progressive filling of their d-orbitals. They typically have electronic configurations of (n-1)d1-10ns0-2, which leads to a variety of oxidation states. Their partially filled d-orbitals are responsible for colored ions and their ability to form coordination complexes with ligands such as ammonia and cyanide.
One of the distinct features of transition elements, especially elements like iron and manganese, is their catalytic activity. Pure metals and their ions catalyze important industrial reactions including the Haber process and contact process. In addition, magnetic properties in these elements arise from the presence of unpaired d-electrons.
| Element | Block | Electronic Configuration | Special Property |
|---|---|---|---|
| Fe | d-block | [Ar] 3d6 4s2 | Variable Oxidation (2+, 3+) |
| Cu | d-block | [Ar] 3d10 4s1 | Catalyst, Blue Complex Ion |
| Ce | f-block | [Xe] 4f1 5d1 6s2 | Variable Oxidation, Used in Glass Polishing |
| U | f-block | [Rn] 5f3 6d1 7s2 | Radioactive, Nuclear Fuel |
F Block Elements: Lanthanides and Actinides
F-block elements consist of two series: lanthanides (atomic numbers 58–71) and actinides (atomic numbers 90–103). Lanthanides are known for their sharp line spectra, similar chemical properties, and the phenomenon of lanthanide contraction, which affects the size of both d- and f-block elements in later periods.
Actinides, starting from thorium (Th) to lawrencium (Lr), are characterized by their radioactive nature, and have significant uses in nuclear chemistry. Elements like uranium and plutonium are essential in nuclear reactors, while others serve as tracers and therapeutic agents in medicine.
Significance of Mock Tests for NEET Chemistry Preparation
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Practicing with chapter-wise mock tests on D and F block elements allows aspirants to analyze question trends and master high-scoring topics. Timed tests simulate the real exam, helping students gain confidence, accuracy, and speed—qualities vital for medical entrance success.
Attempting online NEET mock tests with instant results and detailed solutions can reveal strengths and highlight weak areas. This helps students focus on time management and analytical skills, while periodic performance analysis tracks progress across the NEET syllabus.
Tips for Solving D and F Block MCQs Effectively
Carefully read each question—identify keywords like “most stable,” “colored ion,” or “radioactivity,” which can change the answer. Eliminate options using key concepts, especially trends seen in the periodic table, oxidation states, and electronic configurations.
Remember common exceptions, such as the stability of half-filled and fully filled d and f orbitals. Practice solving previous year’s NEET MCQs, as many questions are conceptually repeated or twisted for reasoning-based approaches in the exam.
Advantages of Online NEET Mock Tests on D and F Block Elements
Online mock tests provide the benefit of immediate scoring, solution discussion, and flexibility to attempt any time and place—even on mobile devices. Students can re-attempt tests to improve their scores and accuracy, ensuring a deep understanding of D and F block chemistry.
The dynamic scoring, peer comparison, and detailed analytics available after each test allow NEET aspirants to develop smart strategies for exam day. The tests are crafted by NTA experts and are updated for NEET 2025 success, making them a must for every serious medical aspirant.
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FAQs on D and F Block Elements NEET 2025 Mock Test: Free Practice Online
1. What are d and f block elements?
The d block elements are elements whose last electron enters the d-orbital, found in Groups 3–12 of the Periodic Table, also called transition elements. f block elements are those whose last electron enters the f-orbital, typically including lanthanides and actinides, and are known as inner transition elements.
2. What are some examples of d-block elements?
Common d-block elements include Scandium (Sc), Titanium (Ti), Iron (Fe), Cobalt (Co), Nickel (Ni), Copper (Cu), and Zinc (Zn). These are metals found in the center of the Periodic Table (Period 4, 5, 6).
3. Which elements are considered f block elements?
The f block includes the lanthanides (atomic numbers 57–71, from Lanthanum (La) to Lutetium (Lu)) and the actinides (atomic numbers 89–103, from Actinium (Ac) to Lawrencium (Lr)).
4. What is the electronic configuration of d-block elements?
The general electronic configuration for d-block elements is (n-1)d1-10ns0-2. For example, Iron (Fe): [Ar] 3d64s2.
5. What are the important properties of d-block elements for NEET/JEET?
Key properties of d-block elements include:• Variable oxidation states• Formation of colored compounds• Paramagnetic behavior• Tendency to form complex ions• High melting and boiling points
6. Why are d-block elements called transition elements?
They are called transition elements because they form a 'transition' between the s-block and p-block elements in the Periodic Table, and their properties change gradually from metallic to non-metallic across periods.
7. Explain the general trends in properties of d-block elements.
General trends in d-block element properties include:• Gradual decrease in atomic size across a period (lanthanide contraction)• Variable oxidation states• Increase in density and melting points• Regularity in chemical reactivity and magnetic character
8. What are some memory tricks to remember d and f block elements?
Use mnemonics and acronyms for groups. For example, to remember the first-row transition elements: ScTiV CrMn FeCo NiCu Zn ("Scary Tiny Vultures Crave Mangoes, Feeble Cows Nibble Cute Zebras"). For lanthanides, look for visualization tools like color-coded periodic tables.
9. How can I download d and f-block elements NEET questions and worksheets in PDF?
You can download chapter-wise NEET/JEET question PDFs and worksheets for d and f-block elements from trusted exam-prep platforms like Vedantu, NTA, or other educational websites. Search for 'd and f block elements questions PDF' or use reference books' practice sections.
10. Are d and f block elements important for NEET 2025?
Yes, d and f block elements are a key part of the NEET Chemistry 2025 syllabus. Concepts such as variable oxidation states, colored ions, complex formation, lanthanide contraction, actinoid contraction, and electronic configuration are frequently asked in NEET and other entrance exams.
11. Do d-block elements form colored compounds? Why?
Yes, most d-block elements form colored ions and compounds due to the presence of unpaired d-electrons. These allow d-d transitions, where electrons absorb specific wavelengths of light, leading to the observed colors.
12. How can NEET mock tests on d and f block elements help improve my score?
Practicing mock tests on d and f block elements will help you:• Identify strong and weak areas in this chapter• Improve speed and accuracy in solving MCQs• Get familiar with NEET-style questions and marking schemes• Enhance confidence with instant scoring and detailed solutions
