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d- and f-Block Elements — Practice Quiz

ICSE · Class 12 · Chemistry

Try a 4-question quiz on d- and f-Block Elements for ICSE Class 12 Chemistry: tap an answer to check it and see why. 60 questions in the full chapter test.

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An infographic showing the trend in the nature of oxides (basic, amphoteric, acidic, neutral) across a period in the periodic table, with examples.
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Quick Quiz: d- and f-Block Elements

0/4

Tap an answer to check it instantly. No sign-up needed for these 4.

1

Which of the following is the correct electronic configuration of Chromium (Z=24)?

2

Why is Zinc (Zn) NOT considered a transition element?

3

What is the colour of KMnO₄ (potassium permanganate) in aqueous solution?

4

What is the oxidation state of Mn in KMnO₄?

60 Questions·
multiple choicetrue false

Sample Questions

1multiple choice
1 marks

The colour of CuSO₄ solution is:

Show answer

Blue

CuSO₄ solution is blue because Cu²⁺ (3d⁹) has one unpaired electron and one d-orbital vacancy. The d-d transition absorbs orange-red light, and the complementary colour (blue) is observed.

2true false
1 marks

All d-block elements are transition elements.

Show answer

False

Zn, Cd, and Hg are d-block elements but are NOT transition elements because they have completely filled d¹⁰ orbitals in their ground state and in all their stable ions. Transition elements require incomplete d-orbitals in atom or ion.

3multiple choice
1 marks

Magnetic moment of an ion with 3 unpaired electrons is:

Show answer

√15 BM

μ = √(n(n+2)) BM. For n=3: μ = √(3×5) = √15 ≈ 3.87 BM. This corresponds to ions like Cr³⁺ (3d³).

4multiple choice
1 marks

Which of the following is used as a catalyst in the Haber process for synthesis of ammonia?

Show answer

Iron (Fe)

Iron is the catalyst in the Haber-Bosch process: N₂ + 3H₂ ⇌ 2NH₃ (450°C, 200 atm). Molybdenum (Mo) is used as a promoter. V₂O₅ is for the Contact process; Pt is for the Ostwald process.

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Frequently Asked Questions

What are the important topics in d- and f-Block Elements for ICSE Class 12 Chemistry?
Key topics in d- and f-Block Elements include Position, Definition, and Classification, Electronic Configuration and Exceptional Cases, Atomic Size, Ionic Size, Density, and Metallic Nature, Ionisation Enthalpy, Oxidation States, and Electrode Potentials. Study these first, then practise questions on each for the ICSE Class 12 board exam.
How many practice questions are there for d- and f-Block Elements?
There are 60 questions on d- and f-Block Elements. Try the 4-question sample quiz on this page first; each answer shows an explanation when you tap it.

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