NEET UG · Chemistry · Class 11

Chemical Bonding and Molecular Structure: NEET previous year questions

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

Asked in 10 years: 24; 10 of 10 papers
10-year average: 2.3; a paper · 2.9 since 2024 +0.8
Typical range: 2–3; questions a paper; fewest 1, most 4
Weighted estimate: 2.7; model, recent papers count more · about 11 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 Chemical Bonding and Molecular Structure

Priority

Must do

Among the chapters that held the first half of all NEET questions in ten years. How bands are set

Past questions: 24in 10 of 10 papers
Study plan gives it: 21 hover 12 months; 16 h over 6

Study this chapter →Practise →

Ideas asked most often

Molecular Shape Prediction3×
Molecular Polarity2×
Bond Order from MO Configuration2×

215 of the 250 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%
Match the lists17%
Recall13%
Concept13%
Calculation8%
Two statements4%

Most common asks: match list on molecular shapes (2); count lone pairs on central atom (1); match list on bond types (1).

Profile

This chapter in numbers

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

Rank, all NEET chapters: #24; of 80 by weighted estimate
Rank in Chemistry: #6; of 21 chapters
Share of the paper: 1.3%; ten-year average
Busiest year: 2024; 4 questions
Year to year: Steady; varies by about 0.7 questions
Long-run direction: +0.07; questions per paper, per year
Easy questions: 33%; 88% of ideas rated hard
With a figure: 4%; graph, diagram or structure
Study time: 21 h; 16 h on a 6-month plan
Marks per study hour: 0.53; #49 of 80 chapters
Foundation for others: 86%; of its ideas are used in other chapters

Difficulty, year by year

Each question rated easy, medium or hard against NCERT.

20173
20182
20191
20202
20213
20222
20232
20244
20252
20263

Easy
Medium
Hard

What it asks you to do

SHARE OF QUESTIONS

Application50%
Recall25%
Concept17%
Multi-step8%

Coverage

How much of the chapter NEET has used

We split the chapter into 250 ideas. In ten years NEET built a question around 11 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: 11
Touched on in a question: 24
Never asked: 215

Topics

What repeats, topic by topic

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

VSEPR Theory · Every year13
211211212
Molecular Orbital Theory · Every year8
11111111
Hybridization · Now and then2
11
Hydrogen Bonding · New since 20241
1

’17’18’19’20’21’22’23’24’25’26

Topic	2017	’18	2019	’20	2021	’22	2023	’24	2025	’26	Total
VSEPR TheoryEvery year	2	1	·	1	2	1	1	2	1	2	13
Molecular Orbital TheoryEvery year	1	1	1	1	·	1	1	·	1	1	8
HybridizationNow and then	·	·	·	·	1	·	·	1	·	·	2
Hydrogen BondingNew since 2024	·	·	·	·	·	·	·	1	·	·	1

02+questions in that year’s paper

VSEPR Theory
Expect an application item that applies the idea to a fresh situation about VSEPR Theory; a match-the-columns item (two lists, pick the correct pairing code) is the next most likely shape. Past framings centre on: match list on molecular shapes; count lone pairs on central atom.

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

Open13 · 54%54%9/102222
10 ideas inside
- Repeated3 · 23%23%3/10
- Repeated2 · 15%15%2/10
- 1 · 8%8%1/10
- 1 · 8%8%1/10
- 1 · 8%8%1/10
- 1 · 8%8%1/10
- 1 · 8%8%1/10
- 1 · 8%8%1/10
- 1 · 8%8%1/10
- 1 · 8%8%1/10
Open8 · 33%33%8/10
Open2 · 8%8%2/10
Open1 · 4%4%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, 20 different ideas were tested. These came more than once, or are new since 2024.

Molecular Shape Prediction3×
match list on molecular shapes
Molecular Polarity2×
identify nonpolar molecule among options
Bond Order from MO Configuration2×
order/ranking of bond order
Highest Occupied Molecular OrbitalNew1×
identify molecular orbital of a diatomic
Polarity of Organic Functional GroupsNew1×
order/ranking of polarity
Bond Order, Stability and Bond LengthNew1×
statement i/ii on bond order
Counting Sigma and Pi BondsNew1×
match list on bond types
Intramolecular Hydrogen BondingNew1×
identify example of a type
Resonance Hybrid GeometriesNew1×
true statement selection on bonding

Idea	Times	Usually asked as
Molecular Shape Predictionmatch list on molecular shapes	3	Match the lists
Molecular Polarityidentify nonpolar molecule among options	2	Other
Bond Order from MO Configurationorder/ranking of bond order	2	One-line MCQ
Highest Occupied Molecular Orbitalidentify molecular orbital of a diatomic	1	One-line MCQNew
Polarity of Organic Functional Groupsorder/ranking of polarity	1	OtherNew
Bond Order, Stability and Bond Lengthstatement i/ii on bond order	1	Two statementsNew
Counting Sigma and Pi Bondsmatch list on bond types	1	Match the listsNew
Intramolecular Hydrogen Bondingidentify example of a type	1	One-line MCQNew
Resonance Hybrid Geometriestrue statement selection on bonding	1	One-line MCQNew

Every question

Chemical Bonding and Molecular Structure questions, year by year

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

NEET 20263 questions

Q75Match the species in List I with their geometry in List II List I | List II A. $\mathrm{PCl_5}$ | I. Tetrahedral B. $\mathrm{BrF_5}$ | II.…Match the lists
Q89Arrange the following compounds in the increasing order of polarity A. $\mathrm{CH_3CH_2OCH_2CH_3}$ B. $\mathrm{CH_3CH_2OH}$ C.…Other
Q90The highest occupied molecular orbital for $\mathrm{Ne_2}$ isOne-line MCQ

NEET 20252 questions

Q62Given below are two statements : Statement I : A hypothetical diatomic molecule with bond order zero is quite stable. Statement II : As…Two statements
Q87Identify the correct orders against the property mentioned A. $H_2O > NH_3 > CHCl_3$ – dipole moment B. $XeF_4 > XeO_3 > XeF_2$ – number…Other

NEET 20244 questions

Q54Match List I with List II. List I (Molecule) | List II (Number and types of bond/s between two carbon atoms) A. ethane | I. one…Match the lists
Q60Match List I with List II. List I (Compound) | List II (Shape/geometry) A. NH $_3$ | I. Trigonal Pyramidal B. BrF $_5$ | II. Square Planar…Match the lists
Q66Intramolecular hydrogen bonding is present inOne-line MCQ · figure
Q87Identify the correct answer.One-line MCQ

NEET 20232 questions

Q70The correct order of energies of molecular orbitals of N $_2$ molecule, is :One-line MCQ
Q82Amongst the following, the total number of species NOT having eight electrons around central atom in its outer most shell, is…One-line MCQ

NEET 20222 questions

Q72Which amongst the following is incorrect statement ?One-line MCQ
Q82Amongst the following which one will have maximum 'lone pair - lone pair' electron repulsions ?One-line MCQ

NEET 20213 questions

Q51 $\mathrm{BF_3}$ is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are :One-line MCQ
Q67Match List - I with List - II. List - I | List - II (a) $\mathrm{PCl_5}$ | (i) Square pyramidal (b) $\mathrm{SF_6}$ | (ii) Trigonal planar…Match the lists
Q92Which of the following molecules is non-polar in nature ?One-line MCQ

NEET 20202 questions

Q91Identify a molecule which does not exist.One-line MCQ
Q98Which of the following set of molecules will have zero dipole moment ?One-line MCQ

NEET 20191 question

Q59Which of the following diatomic molecular species has only π bonds according to Molecular Orbital Theory ?One-line MCQ

NEET 20182 questions

Q51In the structure of $\mathrm{ClF_3}$ , the number of lone pairs of electrons on central atom 'Cl' isOne-line MCQ
Q87Consider the following species : $\mathrm{CN^+}$ , $\mathrm{CN^-}$ , NO and CN Which one of these will have the highest bond order ?One-line MCQ

NEET 20173 questions

Q47Which of the following pairs of compounds is isoelectronic and isostructuralOne-line MCQ
Q53The species, having bond angles of 120° is :One-line MCQ
Q79Which one of the following pairs of species have the same bond order ?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.

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