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Karnataka 2nd PUC Chemistry Chapter 4 Important Questions: The d- and f-Block Elements

Karnataka 2nd PUC Chemistry Chapter 4 covers d- and f-block elements, electronic configuration, transition-element properties, important compounds, lanthanoids, actinoids and applications. Practise conceptual, reaction-based and comparison questions chapter-wise.
authorImagePriyanka Dahima21 Sept, 2026
Karnataka 2nd PUC Chemistry Chapter 4 Important Questions

 

Karnataka 2ndd PUC d and f Block Elements Important Questions: This chapter deals with transition and inner-transition elements. Students need to understand periodic position, electronic configuration, properties and important compounds rather than simply memorising isolated facts.

d and f Block Questions and Answers

  1. What are transition elements?

  2. Write the general electronic configuration of d-block elements.

  3. Why do transition elements show variable oxidation states?

  4. Why are many transition-metal compounds coloured?

  5. What is lanthanoid contraction?

  6. Write two properties of transition elements.

  7. Differentiate between lanthanoids and actinoids.

  8. Give two applications of d- and f-block elements.

  9. Why do transition elements form complexes?

  10. Name important compounds of transition elements included in the syllabus.

2nd PUC d and f Block Important Questions PDF

The latest Karnataka 2nd PUC Chemistry question bank is available as a chapter-wise practice resource for the 2026-27 session.

Karnataka 2nd PUC Chemistry Chapter 4 Important Questions PDF Download

d and f Block 1 Mark Questions

  • Define transition elements.

  • What is lanthanoid contraction?

  • Name an actinoid.

  • What is a variable oxidation state?

  • Give one application of transition elements.

d and f Block 2 Mark Questions

  1. Explain variable oxidation states in transition elements.

  2. Why are transition-metal compounds often coloured?

  3. Give two differences between lanthanoids and actinoids.

  4. Explain lanthanoid contraction.

d and f Block 3 Mark Questions

  1. Explain the general characteristics of transition elements.

  2. Describe the electronic configuration of d-block elements.

  3. Explain the consequences of lanthanoid contraction.

  4. Write important reactions or properties of prescribed transition-metal compounds.

Important Questions on Transition Elements

Students should revise:

  • Variable oxidation states

  • Catalytic behaviour

  • Magnetic properties

  • Colour of compounds

  • Complex formation

  • Alloy formation

  • Important compounds

These areas are closely connected, so understanding the reason behind each property makes revision easier.

Lanthanides and Actinides Important Questions

Prepare short comparisons between lanthanoids and actinoids and revise the concept of lanthanoid contraction carefully.

d and f Block Previous Year Questions

Solve previous-year questions after completing the textbook exercises. Keep answers precise for definition and comparison questions.

Related Resources: 

PW provides Karnataka 2nd PUC exam content, including Karnataka Board Exam Blogs, sample papers, mock tests, guidance sessions, and more. Also, enroll today in Karnataka 2nd PUC Online Coaching to prepare.  

2nd PUC Chemistry Chapter 4 Important Questions FAQs

What are important topics in d and f Block Elements?

Electronic configuration, transition-element properties, variable oxidation states, magnetic and colour properties, lanthanoids, actinoids and applications.

What is lanthanoid contraction?

It refers to the gradual decrease in atomic and ionic radii across the lanthanoid series.

Which topics are important in 2nd PUC Chemistry Chapter 4?

Karnataka 2nd PUC Chemistry Chapter 4 covers d- and f-block elements, electronic configuration, transition-element properties, important compounds, lanthanoids, actinoids and applications.
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