d- And f- Block Elements JEE Mains Questions - List Of Most Asked Questions With Solutions

NTA will shortly release the JEE Main Syllabus 2025 at jeemain.nta.ac.in. Last Year, the complete syllabus of JEE Main underwent some major changes. According to the latest syllabus guidelines, the weightage of Physics has dropped to 22.5%. Due to these changes in the syllabus, certain shifts in chapter-wise weightage have been observed. D and F Block Elements are among such topics. It’s among the least weightage topics in JEE Main Physics Syllabus 2025. This chapter holds 1.39% weightage in the whole syllabus.

D and F Block Elements Is a part of the General Physics section, and every year around 2-3 questions are asked from this chapter. Due to the drop in weightage, you can expect 1-2 questions in JEE Main 2025.
D and F Block Elements in JEE Mains Physics Syllabus 2025 covers all the basic concepts on units and measurements, fundamentals of units, dimensions etc.

Aspirants consider D and F Block Elements as one of the Easiest Chapters in Physics for JEE Main 2025. Even though this chapter has the least weightage in the syllabus, to develop a strong foundation in physics, this particular chapter plays a pivotal role. Hence the candidates need to develop a clear understanding of this chapter. The list of most asked questions from this chapter will help the students with their preparation.

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Some common questions about D and F block elements in JEE Main include:

What are the properties of D-block elements?

D-block elements, also known as transition metals, have partially filled d-orbitals, which allows them to exhibit variable oxidation states. They also form colorful compounds and act as effective catalysts.

What are the properties of F-block elements?

F-block elements, including lanthanides and actinides, have unique f-orbitals that contribute to their characteristic properties, such as lanthanide contraction and radioactive behavior.

What is lanthanide contraction?

Lanthanide contraction is the gradual decrease in atomic and ionic size of lanthanoids as their atomic number increases.

What is the difference between D-block and F-block elements?

The primary distinction between D and F block elements is that D block elements have electrons in their d orbitals, whereas F block elements have electrons in their f orbitals.

D and F block elements are a significant part of JEE Main, making up about 2.8% of the exam. This chapter is considered a scoring section, and students can expect direct questions from it.

D and F Block Elements JEE Mains Questions -

List Of Most Asked Questions With Solutions

In the (JEE) Main, the topic of Physics and Measurement often features questions that have appeared multiple times in previous years. Many questions in this section are either repeated or follow similar patterns, with only minor changes, such as different numerical values or slight modifications in wording.Certain questions have been repeated as many as five times.

Here are some of the most frequently asked and repeated questions:

Question: Which of the following transition metals shows the highest oxidation state in its compounds? This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024

· A) Cr

· B) Mn

· C) Fe

· D) Co

Solution: Manganese (Mn) shows the highest oxidation state (+7) in its compounds. Correct answer is B.

Year: 2024

Question: Which of the following is a property of transition metals? This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024

· A) Low melting points

· B) High ionization energy

· C) Variable oxidation states

· D) Lack of catalytic properties

Solution: Transition metals typically exhibit variable oxidation states. Correct answer is C.

Year: 2022

Question: Which of the following is a characteristic of the lanthanides? This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024

· A) Paramagnetic behavior

· B) High reactivity

· C) All are radioactive

· D) Formation of colored compounds

Solution: Lanthanides are known for their paramagnetic behavior. Correct answer is A.

Year: 2021

Question: Which of the following elements is not a transition metal? This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024

· A) Sc

· B) Ti

· C) Zn

· D) Cu

Solution: Zinc (Zn) is not considered a transition metal because it does not have an incomplete d subshell. Correct answer is C.

Year: 2020

Question: Which of the following has the maximum unpaired d-electrons? This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024

· A) Fe

· B) Cr

· C) Mn

· D) Co

Solution: Manganese (Mn) has the maximum number of unpaired d-electrons. Correct answer is C.

Year: 2019

Question: Which of the following compounds is most likely to show paramagnetic behavior? This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024

· A) CuCl

· B) ZnO

· C) FeCl3

· D) CoCl2

Solution: FeCl3 is expected to show paramagnetic behavior due to unpaired electrons in the d-orbital. Correct answer is C.

Year: 2018

Question: Which of the following is the most stable oxidation state of uranium? This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024

· A) +3

· B) +4

· C) +5

· D) +6

Solution: Uranium shows its most stable oxidation state as +6. Correct answer is D.

Year: 2017

Question: Which of the following transition metals forms colored compounds? This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024

· A) Sc

· B) Ti

· C) Zn

· D) Fe

Solution: Iron (Fe) forms colored compounds due to the presence of d-d transitions. Correct answer is D.

Year: 2016

Question: Which of the following lanthanides is used in mischmetal? This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024

· A) Ce

· B) Nd

· C) Pr

· D) La

Solution: Cerium (Ce) is used in mischmetal, an alloy used in lighter flints. Correct answer is A.

Year: 2015

Question: Which of the following f-block elements is radioactive? This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024

· A) Uranium

· B) Lanthanum

· C) Cerium

· D) Europium

Solution: Uranium is a well-known radioactive element in the f-block. Correct answer is A.

Year: 2014

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