The d- and f-Block Elements CBSE Class 12 PYQ Chapter Wise

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Answer first

The d- and f-Block Elements PYQs (previous year questions) for CBSE Class 12: The d- and f-Block Elements (Chemistry) had 23 questions across the 50 official CBSE Class 12 papers we tagged (2016–2026), and appeared in 10 of them. Asked in 10 of 10 years. The concepts asked in the most papers: Transition Elements, Permanganate Reactions, Permanganate and Dichromate.

Year-wise question count

Asked in 10 of 10 years.

Most-asked concepts

Sorted by the number of papers a concept appeared in.

How to practise The d- and f-Block Elements PYQs

1. Start with the concepts at the top of the table. They have come back the most.
2. Solve one year’s The d- and f-Block Elements questions from the official PDF against the clock, then check the answer listed below.
3. Log every miss as a concept gap, a calculation slip or a misread. Each needs a different fix.
4. Once a concept is clean in two papers, move to the next. Then sit a full paper from the year pages.

Questions by year

Each line gives the question number and paper, type, concept, our one-line summary, with a link to the official PDF.

CBSE Class 122026

• Q.3 (Chemistry (56/1/1)) · MCQ · Transition Elements: Identify the element that is not a transition metal PDF
• Q.15 (Chemistry (56/1/1)) · Assertion-Reason · Actinoids: Range of actinoid oxidation states and radioactivity PDF
• Q.32 (Chemistry (56/1/1)) · Long answer · Transition Elements: Trend in M2+/M potentials, Cu and Mn values; permanganate with iodide PDF

CBSE Class 122025

• Q.3 (Chemistry (56/1/1)) · MCQ · Magnetic Moment: Spin-only magnetic moment of Cr3+ PDF
• Q.4 (Chemistry (56/1/1)) · MCQ · Permanganate Reactions: Product when acidified KMnO4 oxidises sulphite PDF
• Q.18 (Chemistry (56/1/1)) · Very short answer · Permanganate and Dichromate: Complete and balance permanganate and dichromate redox equations PDF
• Q.25 (Chemistry (56/1/1)) · Short answer · Transition Elements: Cu potential, strong reducing M2+, colourless Zn2+ salts PDF

CBSE Class 122024

• Q.1 (Chemistry (56/1/1)) · MCQ · Ionisation Enthalpy: 3d element with the highest third ionisation enthalpy PDF
• Q.14 (Chemistry (56/1/1)) · Assertion-Reason · Lanthanoid Contraction: Difficulty of separating Zr and Hf PDF
• Q.33 (Chemistry (56/1/1)) · Long answer · Transition Elements: Reasons on Zn group m.p., Cr2+ vs Mn3+, Cu potential; KMnO4, dichromate PDF

CBSE Class 122023

• Q.7 (Chemistry (56/1/1)) · MCQ · Lanthanoids: Most common stable oxidation state of lanthanoids PDF
• Q.21 (Chemistry (56/1/1)) · Very short answer · Permanganate and Dichromate: Complete permanganate-nitrite and dichromate half equations PDF
• Q.34 (Chemistry (56/1/1)) · Long answer · Transition Elements: Reasons on Mn +7, catalysis, Cr2+ vs Mn3+, Zn atomisation, Cu+ stability PDF

CBSE Class 122022

• Q.4 (Chemistry (56/1/1)) · Short answer · Transition Metal Ions: Pick most stable, oxidising and colourless ion among Ti4+, V3+, Cr3+, Mn3+ PDF
• Q.8 (Chemistry (56/1/1)) · Short answer · Transition Elements: Reasons on atomisation enthalpy, lanthanoid separation, Cu potential PDF

CBSE Class 122020

• Q.13 (Chemistry (56/1/1)) · MCQ · Oxidation States: 3d element showing the most oxidation states PDF
• Q.36 (Chemistry (56/1/1)) · Long answer · Transition Elements: Reasons on Cu(I)/Cu(II) colour, chromate in acid, Zn group; Co2+ moment PDF

CBSE Class 122019

• Q.9 (Chemistry (56/1/1)) · Short answer · Permanganate Chemistry: Identify A-D in manganate/permanganate reaction sequence PDF
• Q.18 (Chemistry (56/1/1)) · Short answer · Transition Elements: Reasons on catalysis, Mn and Cu electrode potentials, actinoid configs PDF

CBSE Class 122018

• Q.10 (Chemistry (56/1)) · Short answer · Permanganate Reactions: Complete and balance two permanganate redox equations PDF
• Q.16 (Chemistry (56/1)) · Short answer · Transition Elements: Reasons on Mn3+/Mn2+ potential, atomisation enthalpy, Sc3+ vs Ti3+ colour PDF

CBSE Class 122017

• Q.24 (Chemistry (56/1)) · Long answer · Transition Elements: Variable oxidation states, soft Zn group, Mn3+/Mn2+ potential, lanthanoids PDF

CBSE Class 122016

• Q.25 (Chemistry (56/1/N)) · Long answer · Transition Elements: Mn oxidation states, Zr/Hf similarity, catalysis; complete Mn and Cr equations PDF

Other Chemistry chapters

• The Solid State PYQs
• Solutions PYQs
• Electrochemistry PYQs
• Chemical Kinetics PYQs
• Surface Chemistry PYQs
• General Principles of Isolation of Elements PYQs
• The p-Block Elements PYQs
• Coordination Compounds PYQs
• Haloalkanes and Haloarenes PYQs
• Alcohols, Phenols and Ethers PYQs
• Aldehydes, Ketones and Carboxylic Acids PYQs
• Amines PYQs
• Biomolecules PYQs
• Polymers PYQs
• Chemistry in Everyday Life PYQs

FAQ

How many The d- and f-Block Elements questions come in CBSE Class 12?

In the official papers we tagged: 3 in 2026, 4 in 2025, 3 in 2024, 3 in 2023, 2 in 2022, 2 in 2020, 2 in 2019, 2 in 2018, 1 in 2017 and 1 in 2016. That is 23 questions in all, about 8% of Chemistry.

Which The d- and f-Block Elements topics repeat in CBSE Class 12?

Asked in the most papers: Transition Elements, Permanganate Reactions, Permanganate and Dichromate. The concept table lists every one with its count.

Are these official CBSE Class 12 questions?

Yes. Every question is from an official CBSE Class 12 paper hosted on our year pages. The one-line summaries are ours; open the PDF linked beside each question for the full text.