NEET UG · Chemistry · Class 12

The d- and f-Block Elements: NEET previous year questions

21 questions in ten years of NEET, asked in 10 of 10 years. Here is what this chapter tests and how.

Asked in 10 years: 21; 10 of 10 papers
10-year average: 2.0; a paper · 2.6 since 2024 +0.8
Typical range: 2–3; questions a paper; fewest 1, most 3
Weighted estimate: 2.4; model, recent papers count more · about 10 marks

Typical range (fact)
10-year average (fact)
Weighted estimate (model)

Typical range: questions per paper in the middle eight of the ten papers, leaving out the single highest and lowest year (about the 10th to 90th percentile), each paper scaled to 180 questions. The ten-year average and the range are historical fact. The weighted estimate is a model: each paper's share, with recent papers counting more (half-life three years), and dropped syllabus removed. It is a guide to effort, not a forecast.

What to do

How to spend time on The d- and f-Block Elements

Priority

Should do

Among the chapters that took NEET from half to 80% of its questions. How bands are set

Past questions: 21in 10 of 10 papers
Study plan gives it: 18 hover 12 months; 14 h over 6

Study this chapter →Practise →

Ideas asked most often

Magnetic Moment and Colour of d- and f-Block Ions7×
Ionisation and Hydration Enthalpy of Transition Metal Ions2×

Questions per year

Kind of question

SHARE OF 10 YEARS

Concept33%
Recall29%
Calculation10%
Application10%
Match the lists10%
Two statements5%
Assertion–reason5%

Most common asks: reason for relative stability (2); match list on magnetic moments of ions (1); identify ions with equal spin-only magnetic moment (1).

Profile

This chapter in numbers

Where it ranks, how steady it is, and what it costs to study.

Rank, all NEET chapters: #32; of 80 by weighted estimate
Rank in Chemistry: #8; of 21 chapters
Share of the paper: 1.1%; ten-year average
Busiest year: 2024; 3 questions
Year to year: Steady; varies by about 0.5 questions
Long-run direction: +0.10; questions per paper, per year
Easy questions: 24%; 99% of ideas rated hard
With a figure: 0%; graph, diagram or structure
Study time: 18 h; 14 h on a 6-month plan
Marks per study hour: 0.54; #45 of 80 chapters
Foundation for others: 50%; of its ideas are used in other chapters

Difficulty, year by year

Each question rated easy, medium or hard against NCERT.

20172
20182
20191
20202
20212
20222
20232
20243
20252
20263

Easy
Medium
Hard

What it asks you to do

SHARE OF QUESTIONS

Concept38%
Recall33%
Calculation14%
Application14%

Topics

What repeats, topic by topic

Questions per topic in each year's paper. Topics that come every year are worth learning first.

d- and f-Block Elements · Every year21
2212222323

’17’18’19’20’21’22’23’24’25’26

Topic	2017	’18	2019	’20	2021	’22	2023	’24	2025	’26	Total
d- and f-Block ElementsEvery year	2	2	1	2	2	2	2	3	2	3	21

03+questions in that year’s paper

d- and f-Block Elements
Expect a conceptual single-answer item (reasoning rather than recall) about d- and f-Block Elements; a one-line factual recall item is the next most likely shape. Past framings centre on: reason for relative stability; match list on magnetic moments of ions.

Drill down

Topic, idea, question

Open a topic to see every idea NEET tested inside it, then open an idea to read the questions. Each row shows its ten papers.

topicAskedShareYears’17’18’19’20’21’22’23’24’25’26

Open21 · 100%100%10/10222222323
14 ideas inside
- Repeated7 · 33%33%5/1022
- Repeated2 · 10%10%2/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10

Squares are the ten papers, 2017 to 2026; darker means more questions. Share is of the level above.

Ideas

The exact ideas NEET has asked

Inside the topics, 14 different ideas were tested. These came more than once, or are new since 2024.

Magnetic Moment and Colour of d- and f-Block Ions7×
match list on magnetic moments of ions
Ionisation and Hydration Enthalpy of Transition Metal Ions2×
reason for relative stability
Preparation and Thermal Decomposition of KMnO4New1×
identify product of thermal decomposition
Melting Points of Transition MetalsNew1×
assertion-reason on transition metals
Transition Metals as CatalystsNew1×
match list on catalysts and processes
Trends in M3+/M2+ Electrode PotentialsNew1×
reason for relative stability

Idea	Times	Usually asked as
Magnetic Moment and Colour of d- and f-Block Ionsmatch list on magnetic moments of ions	7	One-line MCQ
Ionisation and Hydration Enthalpy of Transition Metal Ionsreason for relative stability	2	One-line MCQ
Preparation and Thermal Decomposition of KMnO4identify product of thermal decomposition	1	One-line MCQNew
Melting Points of Transition Metalsassertion-reason on transition metals	1	Assertion–reasonNew
Transition Metals as Catalystsmatch list on catalysts and processes	1	Match the listsNew
Trends in M3+/M2+ Electrode Potentialsreason for relative stability	1	One-line MCQNew

Every question

The d- and f-Block Elements questions, year by year

The opening words of each question as it appeared in the official paper.

NEET 20263 questions

Q61Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Generally, 3d…Assertion–reason
Q67The lanthanide ion having four unpaired electrons is (Given : Atomic numbers of Ce = 58, Nd = 60, Tb = 65 and Ho = 67)One-line MCQ
Q85The green paramagnetic species formed by heating $\mathrm{KMnO_4}$ at 513 K isOne-line MCQ

NEET 20252 questions

Q71Given below are two statements : Statement I : Ferromagnetism is considered as an extreme form of paramagnetism. Statement II : The number…Two statements
Q80Match List - I with List - II List-I | List-II A. Haber process | I. Fe catalyst B. Wacker oxidation | II. $PdCl_2$ C. Wilkinson catalyst…Match the lists

NEET 20243 questions

Q67'Spin only' magnetic moment is same for which of the following ions? A. Ti $^{3+}$ B. Cr $^{2+}$ C. Mn $^{2+}$ D. Fe $^{2+}$ E. Sc $^{3+}$ …Other
Q84The E° value for the Mn $^{3+}$ /Mn $^{2+}$ couple is more positive than that of Cr $^{3+}$ /Cr $^{2+}$ or Fe $^{3+}$ /Fe $^{2+}$ due to change ofOne-line MCQ
Q94The pair of lanthanoid ions which are diamagnetic isOne-line MCQ

NEET 20232 questions

Q60The stability of Cu $^{2+}$ is more than Cu $^{+}$ salts in aqueous solution due to -One-line MCQ
Q86Which of the following statements are INCORRECT? A. All the transition metals except scandium form MO oxides which are ionic. B. The…Other

NEET 20222 questions

Q84Gadolinium has a low value of third ionisation enthalpy because ofOne-line MCQ
Q96In the neutral or faintly alkaline medium, $\mathrm{KMnO_4}$ oxidises iodide into iodate. The change in oxidation state of manganese in…One-line MCQ

NEET 20212 questions

Q56Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of :One-line MCQ
Q68The incorrect statement among the following is :One-line MCQ

NEET 20202 questions

Q103The calculated spin only magnetic moment of $\mathrm{Cr^{2+}}$ ion is :Numerical
Q126Identify the incorrect statement.One-line MCQ

NEET 20191 question

Q80The manganate and permanganate ions are tetrahedral, due to :One-line MCQ

NEET 20182 questions

Q69Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code : Column…Match the lists
Q70Which one of the following ions exhibits d-d transition and paramagnetism as well ?One-line MCQ

NEET 20172 questions

Q48 $\mathrm{HgCl_2}$ and $\mathrm{I_2}$ both when dissolved in water containing $\mathrm{I^-}$ ions the pair of species formed is :One-line MCQ
Q68The reason for greater range of oxidation states in actinoids is attributed toOne-line MCQ

Questions from the official NEET UG papers published by NTA (CBSE before 2019). Topic and idea tags, counts and notes are Lumi’s.

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