NEET UG · Chemistry · Class 11
Classification of Elements and Periodicity in Properties: NEET previous year questions
13 questions in ten years of NEET, asked in 9 of 10 years. Here is what this chapter tests and how.
- Asked in 10 years
- 13
- 9 of 10 papers
- 10-year average
- 1.3
- a paper · 1.9 since 2024 +1.0
- Typical range
- 1–2
- questions a paper; fewest 0, most 2
- Weighted estimate
- 1.6
- model, recent papers count more · about 6 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 Classification of Elements and Periodicity in Properties
Priority
Among the chapters that shared the last fifth of the questions. How bands are set
- Past questions
- 13in 9 of 10 papers
- Study plan gives it
- 10 hover 12 months; 8 h over 6
Ideas asked most often
- Ionization Enthalpy Trends3×
61 of the 88 ideas in Lumi’s map of this chapter have not been asked or touched in ten years. New questions often come from ideas like these, so learn the whole chapter, not just the list above.
Questions per year
Kind of question
SHARE OF 10 YEARS- Application46%
- Recall15%
- Concept15%
- Match the lists15%
- Assertion–reason8%
Most common asks: order/ranking of property (4); predict formula of ionic compound (1); match list on element names (1).
Profile
This chapter in numbers
Where it ranks, how steady it is, and what it costs to study.
- Rank, all NEET chapters
- #59
- of 80 by weighted estimate
- Rank in Chemistry
- #18
- of 21 chapters
- Share of the paper
- 0.7%
- ten-year average
- Busiest year
- 2020
- 2 questions
- Year to year
- Steady
- varies by about 0.6 questions
- Long-run direction
- +0.11
- questions per paper, per year
- Easy questions
- 62%
- 29% of ideas rated hard
- With a figure
- 0%
- graph, diagram or structure
- Study time
- 10 h
- 8 h on a 6-month plan
- Marks per study hour
- 0.58
- #35 of 80 chapters
- Foundation for others
- 13%
- of its ideas are used in other chapters
Difficulty, year by year
Each question rated easy, medium or hard against NCERT.
- 20171
- 20181
- 20191
- 20202
- 2021
- 20221
- 20231
- 20242
- 20252
- 20262
- Easy
- Medium
- Hard
What it asks you to do
SHARE OF QUESTIONS- Application46%
- Recall31%
- Concept23%
Coverage
How much of the chapter NEET has used
We split the chapter into 88 ideas. In ten years NEET built a question around 10 of them. Most of the chapter has never been asked, which is why learning it whole beats memorising past questions.
- Asked as the main idea
- 10
- Touched on in a question
- 17
- Never asked
- 61
Topics
What repeats, topic by topic
Questions per topic in each year's paper. Topics that come every year are worth learning first.
- Periodic Properties · Every year13111211222
| Topic | 2017 | ’18 | 2019 | ’20 | 2021 | ’22 | 2023 | ’24 | 2025 | ’26 | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Periodic PropertiesEvery year | 1 | 1 | 1 | 2 | · | 1 | 1 | 2 | 2 | 2 | 13 |
Periodic Properties
Expect an application item that applies the idea to a fresh situation about Periodic Properties; a match-the-columns item (two lists, pick the correct pairing code) is the next most likely shape. Past framings centre on: order/ranking of property; predict formula of ionic compound.
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.
11 ideas inside
- Repeated3 · 23%
- 1 · 8%
- 1 · 8%
- 1 · 8%
- 1 · 8%
- 1 · 8%
- 1 · 8%
- 1 · 8%
- 1 · 8%
- 1 · 8%
- 1 · 8%
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, 11 different ideas were tested. These came more than once, or are new since 2024.
- Ionization Enthalpy Trends3×
order/ranking of property
- Fluorine vs Chlorine Electron Gain EnthalpyNew1×
order/ranking of property
- Ionization Enthalpy Anomaly: Nitrogen vs OxygenNew1×
assertion-reason on periodic trend
- s, p, d, f Block ClassificationNew1×
identify elements by electronic configuration
- Electronegativity TrendsNew1×
order/ranking of property
Every question
Classification of Elements and Periodicity in Properties questions, year by year
The opening words of each question as it appeared in the official paper.
NEET 20262 questions
- Q53Among the following options, the correct trend in the electron gain enthalpy isOne-line MCQ
- Q70Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The first ionization…Assertion–reason
NEET 20252 questions
- Q47Which of the following statements are true? A. Unlike Ga that has a very high melting point, Cs has a very low melting point. B. On…Other
- Q53Which among the following electronic configurations belong to main group elements? A. [Ne] B. [Ar] C. [Kr]…Other
NEET 20242 questions
- Q71Arrange the following elements in increasing order of first ionization enthalpy: Li, Be, B, C, N Choose the correct answer from the…One-line MCQ
- Q79Arrange the following elements in increasing order of electronegativity: N, O, F, C, Si Choose the correct answer from the options given…One-line MCQ
NEET 20231 question
- Q69The element expected to form largest ion to achieve the nearest noble gas configuration is :One-line MCQ
NEET 20221 question
- Q51The IUPAC name of an element with atomic number 119 isOne-line MCQ
NEET 20202 questions
- Q96Identify the incorrect match. Name | IUPAC Official Name (a) Unnilunium | (i) Mendelevium (b) Unniltrium | (ii) Lawrencium (c) Unnilhexium…Match the lists
- Q131Match the following : Oxide | Nature (a) CO | (i) Basic (b) BaO | (ii) Neutral (c) | (iii) Acidic (d)…Match the lists
NEET 20191 question
- Q60For the second period elements the correct increasing order of first ionisation enthalpy is :One-line MCQ
NEET 20181 question
- Q88Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is ,…One-line MCQ
NEET 20171 question
- Q72The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration ?One-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.