Kerala Plus Two Chemistry Chapter 4: d and f Block Elements Important Questions

Transition and inner transition metals form an essential part of inorganic chemistry. Kerala Plus Two Chemistry d and f Block Elements MIQs focus on core trends, chemical reactions, and coordination behaviour. Board exams often feature direct conceptual questions, reasoning problems, and chemical equations from this chapter. Reviewing the Kerala Class 12 Syllabus helps align your preparation with key scoring areas.

 Solving these selected problems will help students identify recurring question patterns. You will build clear concepts and improve your answer-writing speed. This question bank serves as an efficient revision tool before the final exams.

Important Questions for Kerala Plus Two Chemistry d and f Block Elements

Reviewing standard questions ensures complete mastery of key topics. Focus on balancing redox reactions, explaining anomalous properties, and understanding colour formation in transition metal ions according to the Kerala Plus Two Exam Pattern. Here are a few important questions on d- and f-block elements that will help you practise for the Kerala Plus Two Chemistry board exam:

1. Transition elements show variable oxidation states and many of the transition metal ions are attracted by a magnetic field. a) Give reason for variability of oxidation state. b) Name the two types of magnetic behaviour.

2. The observed magnetic moment of Sc³⁺ was found to be zero. Calculate the magnetic moment of Sc³⁺ using the spin-only formula and compare the result of observed and calculated magnetic moment.

3. Potassium permanganate and Potassium dichromate are oxidising agents. a) Name the ores of the above compounds from which they are prepared. b) Give one example each for the oxidising property of them. Write down the balanced chemical equation.

4. Potassium permanganate is a violet crystal. What are the products obtained on strong heating of KMnO₄ crystals? Write the balanced chemical equation.

5. a) Transition elements are d-block elements. Write any 4 characteristic properties of transition elements? b) What is the common oxidation state of Lanthanoids?

6. Atomic size increases as we come down a group, but in 4th group of the periodic table, Zr and Hf have almost similar atomic size. Why?

7. Zn (atomic number = 30) is not a transition element, though it is a d block element. Why?

8. Potassium dichromate (K₂Cr₂O₇) is an important compound of chromium. Describe the method of preparation of potassium dichromate from chromite ore.

9. What is misch metal? Mention any one of its use.

10. What is Lanthanoid contraction? Give reason for it.

11. KMnO₄ is a purple coloured crystal and it acts as an oxidant. How will you prepare KMnO₄ from MnO₂?

12. Cr²⁺ and Mn³⁺ have d⁴ configuration. But Cr²⁺ is reducing and Mn³⁺ is oxidising. Why?

13. Transition metal ions are generally coloured. Why?

14. Transition metals and many of their compounds act as catalyst. Give reasons.

15. Write any three applications of d- and f- block elements.

Kerala Plus Two Chemistry d and f Block Elements PDF Download

The Kerala Plus Two Chemistry d and f Block Elements MIQs PDF covers oxidation states, magnetic properties, KMnO₄ and K₂Cr₂O₇, lanthanoid contraction, coloured ions and catalysis. It comes with solutions and can be saved to your device for offline revision. Match your preparation with the Kerala Class 12 Syllabus and the Kerala Plus Two Exam Pattern, and plan your revision using the Kerala Plus Two Time Table 2027.

How to Use Important Questions for Kerala Class 12 Chemistry d and f Block Elements for Exam Preparation

Practising organised questions improves clarity and builds accuracy. Follow these practical steps to prepare effectively for your board exams:

• Master Basic Trends: Study electronic configurations, atomic radii, and standard reduction potentials thoroughly from textbooks first.

• Solve Reasoning Problems: Practice scientific explanations for anomalous electronic configurations and catalytic activity step by step.

• Memorise Preparation Reactions: Write down the preparation and reactions of potassium permanganate and potassium dichromate repeatedly.

• Practice with Question Banks: Solve problems from the d and f Block Elements Class 12 Question Bank to evaluate your preparation level.

• Check Marking Schemes: Compare your written responses with standard solutions to match official evaluation criteria and boost your score under the Kerala Plus Two Grading and Marking system.

Revise the important questions on d- and f-Block Elements, including oxidation states, magnetic properties, and lanthanoid contraction, to strengthen your Chemistry preparation. Practise the MIQs and review the solutions to improve your understanding before the Kerala Plus Two board exams.