In JEE Mains Chemistry, chemical bonding and molecular structure is one of the most important chapters. 2 to 3 questions are asked from this chapter every year in each shift of JEE Main. Molecular Orbital Theory (MOT), Hybridisation & VSEPR Theory, Dipole Moment & Polarity, and Fajan’s Rules & Hydrogen Bonding are some of the most asked concepts from this chapter.
JEE Mains 2027 Chemical Bonding & Molecular Structure Questions
JEE Main Chemical Bonding & Molecular Structure Questions 2027: In the Chemistry section of JEE Mains, Chemical Bonding & Molecular Structure remains the single highest-yield chapter from Inorganic/Physical Chemistry. This chapter consistently accounted for 8% to 10% of the total Chemistry section across all exam shifts in the last 5 years. In each shift, approximately 2 to 3 questions come from the chemical bonding chapter. On this page, candidates can get JEE Main Chemical Bonding & Molecular Structure PYQs and practice papers. We also provided a detailed analysis of chemical bonding chapter weightage and high priority concepts/subtopics to prepare for the JEE Main 2027 exam.
- Key Highlights for JEE Main Chemical Bonding & Molecular Structure
- JEE Mains 2027 Chemical Bonding and Molecular Structure Questions
- JEE Main Chemical Bonding & Molecular Structure Weightage: 5-Year Trend Analysis (2021 to 2026)
- JEE Mains Chemical Bonding & Molecular Structure Concept-Wise Weightage (2021 to 2026)
- Preparation Strategy for Chemical Bonding & Molecular Structure for JEE Main 2027
- High Probability JEE Main 2027 Chemical Bonding and Molecular Structure Questions
Key Highlights for JEE Main Chemical Bonding & Molecular Structure
After the analysis of the past 5 year JEE Main question papers, Shiksha experts have the following observations for the chemical bonding and molecular structure questions:
- Consistent appearance each year: 2 to 3 direct questions per shift.
- Most repeated concept:
- Molecular Orbital Theory (MOT): Electronic configuration of N2 vs. O2 systems, mixing of s-p orbitals, fractional bond orders, and identifying diamagnetic vs. paramagnetic species.
- Hybridisation & VSEPR Theory: Determining lone pair-bond pair distribution and exact geometry for interhalogens, noble gas compounds, and polyatomic anions (e.g., XeF4, XeO3, SF4, I3-, ClF3).
- Dipole Moment & Polarity: Comparing planar vs. non-planar polarities (NF3 vs. NH3, BF3, SO2).
- Fajan’s Rules & Hydrogen Bonding: Covalent vs. ionic character trends, lattice energy comparisons, and boiling point/solubility anomalies due to intra vs. intermolecular H-bonding (o-nitrophenol vs. p-nitrophenol).
- Type of questions asked: Over 85% are single-choice MCQs and approximately 15% appear as integer/numerical value questions in JEE Mains exam.
Also Check:
| JEE Main Vector & 3D Questions 2027 | JEE Main 2027 Matrices & Determinants Questions |
JEE Mains 2027 Chemical Bonding and Molecular Structure Questions
From below, candidates can download the JEE Main questions for the Chemical Bonding and Molecular Structure chapters. These questions have been curated from the past 5 year JEE Mains question papers.
Question 1
Heat treatment of muscular pain involves radiation of a wavelength of about 900 nm. Which spectral line of the H atom is suitable for this?
Given: Rydberg constant RH = 105 cm-1, h = 6.6 × 10-34 J s, c = 3 × 108 m/s
- Lyman series, ∞ → 1
- Paschen series, 5 → 3
- Paschen series, ∞ → 3
- Balmer series, ∞ → 2
Question 2
Match LIST-I with LIST-II.
| LIST-I (Classification of molecules based on the octet rule) | LIST-II (Example) |
|---|---|
| A. Molecules obeying octet rule | I. NO, NO2 |
| B. Molecules with incomplete octet | II. BCl3, AlCl3 |
| C. Molecules with incomplete octet with odd electron | III. H2SO4, PCl5 |
| D. Molecules with expanded octet | IV. CCl4, CO2 |
Choose the correct answer from the options given below:
- A-IV, B-I, C-III, D-II
- A-II, B-IV, C-III, D-I
- A-IV, B-II, C-I, D-III
- A-III, B-II, C-I, D-IV
Question 3
Given below are two statements:
Statement (I): For a given shell, the total number of allowed orbitals is given by n2.
Statement (II): For any subshell, the spatial orientation of the orbitals is given by -l to +l values including zero.
In the light of the above statements, choose the correct answer from the options given below:
- Both Statement I and Statement II are true
- Statement I is true but Statement II is false
- Statement I is false but Statement II is true
- Both Statement I and Statement II are false
Question 4
Which of the following statement is true with respect to H2O, NH3 and CH4?
A. The central atoms of all the molecules are sp3 hybridized.
B. The H-O-H, H-N-H and H-C-H angles in the above molecules are 104.5°, 107.5° and 109.5°, respectively.
C. The increasing order of dipole moment is CH4 < NH3 < H2O.
D. Both H2O and NH3 are Lewis acids and CH4 is a Lewis base.
E. A solution of NH3 in H2O is basic. In this solution NH3 and H2O act as Lowry-Brønsted acid and base respectively.
Choose the correct answer from the options given below:
- A, B and C only
- A, B, C and E only
- C, D and E only
- A, D and E only
Question 5
Which of the following linear combinations of atomic orbitals will lead to the formation of molecular orbitals in homonuclear diatomic molecules [internuclear axis in z-direction]?
A. 2pz and 2px
B. 2s and 2px
C. 3dxy and 3dx2-y2
D. 2s and 2pz
E. 2pz and 3dx2-y2
Choose the correct answer from the options given below:
- A and B Only
- D Only
- E Only
- C and D Only
Question 6
For the hydrogen atom, the orbital/s with the lowest energy is/are:
(A) 4s
(B) 3px
(C) 3dx2-y2
(D) 3dz2
(E) 4pz
Choose the correct answer from the options given below:
- (A), (B) and (C) only
- (A) only
- (B) only
- (B), (C) and (D) only
Question 7
Given below are two statements:
Statement (I): Experimentally determined oxygen-oxygen bond lengths in O3 are found to be same and the bond length is greater than that of a O=O (double bond) but less than that of a single (O−O) bond.
Statement (II): The strong lone pair-lone pair repulsion between oxygen atoms is solely responsible for the fact that the bond length in ozone is smaller than that of a double bond (O=O) but more than that of a single bond (O−O).
In the light of the above statements, choose the correct answer from the options given below:
- Statement I is false but Statement II is true
- Both Statement I and Statement II are true
- Statement I is true but Statement II is false
- Both Statement I and Statement II are false
Question 8
Given below are two statements:
Statement I: According to Bohr's model of hydrogen atom, the angular momentum of an electron in a given stationary state is quantised.
Statement II: The concept of electron in Bohr's orbit, violates the Heisenberg uncertainty principle.
In the light of the above statements, choose the most appropriate answer from the options given below:
- Both Statement I and Statement II are correct.
- Statement I is correct but Statement II is incorrect.
- Statement I is incorrect but Statement II is correct.
- Both Statement I and Statement II are incorrect.
Question 9
Given,
(A) n = 5, ml = -1
(B) n = 3, l = 2, ml = -1, ms = +1⁄2
The maximum number of electron(s) in an atom that can have the quantum numbers as given in (A) and (B) respectively are:
- 8 and 1
- 2 and 4
- 4 and 1
- 26 and 1
Question 10
The work functions of two metals (MA and MB) are in the 1 : 2 ratio. When these metals are exposed to photons of energy 6 eV, the kinetic energy of liberated electrons of MA : MB is in the ratio of 2.642: 1. The work functions (in eV) of MA and MB are respectively:
- 1.4, 2.8
- 1.5, 3.0
- 3.1, 6.2
- 2.3, 4.6
Commonly asked questions
Chapterwise weightage of class 11 and 12 topics in JEE Main are mentioned below:
- Physics: Current Electricity Waves AC, Magnetism, Laws of Motion Work, Power and Energy.
- Chemistry the high weightage topics are s and p block elements, Coordination compounds, Thermodynamics Gaseous state, Chemical bonding, Atomic structure, Polymers, Environmental Chemistry Organic Chemistry.
- Mathematics, the high weightage topics are Sequence and Series Vectors and 3D, Integral and Differential Calculus, Definite and Indefinite Integral.
Usually, in the JEE Mains computer-based exam, questions from maths are presented first, followed by Physics and Chemistry.
But candidates can appear for any section first, as per their preference.
Students who are preparing for JEE Main exam are advised to first cover the entire JEE Main syllabus. Covering only the high weightage chapters would decrease their chances of getting full/high score in JEE Main exam. Only after covering the entire syllabus, students can check most important chapters for JEE Mains.
There are two question types in JEE Main exam. Multiple choice questions and numerical ability questions. In MCQ, every question has 4 options with only 1 correct answer. Select the correct option. In numerical ability question type, no options are there. Solve them and write answer using keyword and mouse.
JEE Main Chemical Bonding & Molecular Structure Weightage: 5-Year Trend Analysis (2021 to 2026)
From the past 5 year analysis following has been the weightage of the Chemical Bonding & Molecular Structure chapter:
| Exam Year |
Typical Questions / Shift |
Section Weightage (Approx.) |
Marks |
|---|---|---|---|
| JEE Main 2026 |
2 to 3 questions |
8.5% to 10.0% |
8 to 12 marks |
| JEE Main 2025 |
2 to 3 questions |
8.0% to 10.0% |
8 to 12 marks |
| JEE Main 2023 |
2 to 3 questions |
7.5% to 9.5% |
8 to 12 marks |
| JEE Main 2022 |
2 to 3 questions |
8.0% to 10.0% |
8 to 12 marks |
| JEE Main 2021 |
2 to 4 questions |
8.5% to 11.0% |
8 to 16 marks |
JEE Mains Chemical Bonding & Molecular Structure Concept-Wise Weightage (2021 to 2026)
It has been noted that from the chemical bonding and molecular structure chapter, numerical value type question re asked around lone pairs, bond order, or number of paramagnetic species. Check below the most asked concepts/subtopics from this chapter:
| Subtopic / Concept |
Share of Chapter Questions |
Core Recurring Question Types |
|---|---|---|
| Molecular Orbital Theory (MOT) |
35% |
Diatomic homonuclear/heteronuclear species Calculation of Bond Order and Bond Length ordering Magnetic Behaviour (diamagnetic vs. paramagnetic identification) |
| VSEPR Theory & Hybridisation |
25% |
Predicting steric number, hybridisation, and geometry vs. shape. Counting lone pair–bond pair combinations Iso-structural and isoelectronic species matching |
| Dipole Moment & Polarity |
15% |
Zero vs. non-zero dipole moment Directional vector comparisons |
| Hydrogen Bonding & Intermolecular Forces |
15% |
Intermolecular vs intramolecular H-bonding effects on boiling points, melting points, and solubility Extent and strength of H-bonds across hydrides of groups 15, 16, and 17 |
| Fajan’s Rule & Formal Charge / Resonance |
10% |
Ionic vs. Covalent character trends based on cation size, charge, and pseudo-inert gas configuration. Thermal stability and solubility of carbonates/sulfates. Formal charge calculations and equivalent Lewis structures |
Commonly asked questions
JEE Main 2026 exam pattern has been released by the NTA. As per exam pattern, the JEE Main Paper 1 (BE/B.Tech) exam will consist of 75 questions, 25 each from Physics Chemistry and Mathematics. Out of 25 questions, 20 will be MCQs and 5 will be NAV. Students need to answer all 75 questions. JEE Main paper 2A for B.Arch consists of 77 questions of which 25 are from Mathematics, 50 from General Aptitude and 2 from Drawing. In Paper 2B for BPlan total questions are 100 of which 25 are from Mathematics, 50 from General Aptitude and 25 from Planning.
The question paper will have no internal choices within questions and total duration of exam is 3 hours.
Students can download JEE Main previous year question paper from Shiksha page. Candidates are provided JEE Main previous year question papers from the year 2014 to 2026. The papers can be downloaded as PDF and can be practised to prepare for the exam.
JEE Main question paper is in English, Hindi and language selected when you filled application form. In total, JEE Main is in 13 languages and you can select any language out of available options. You cannot switch language of question paper during exam.
JEE Main mock tests are available online on nta.ac.in. Download these for free or you can also practice online. You can download JEE Main mock test papers for free from Shiksha page as well.
Preparation Strategy for Chemical Bonding & Molecular Structure for JEE Main 2027
Check below some tips to ace the chemical bonding and the molecular structure chapter from the JEE Main syllabus 2027:
- Master VSEPR & Hybridisation Calculations: Practice determining the steric number quickly to immediately identify molecular geometry, bond angles, and lone pair repulsions.
- Memorise Molecular Orbital Theory (MOT): Memorise the energy level diagrams. Focus on calculating bond orders, identifying bond lengths, and predicting magnetic properties (diamagnetic vs. paramagnetic).
- Learn Dipole Moment Exceptions: Go beyond simple symmetry. Practice frequently tested vectors and anomalies, chloromethane isomers, and ortho/meta/para-substituted benzene rings.
- Focus on Hydrogen Bonding & Fajan’s Rule: Master the criteria for polarising power and polarizability (charge density, pseudo-inert gas configuration) to predict covalent character, melting points, and solubility, alongside the physical property impacts of intermolecular vs. intramolecular H-bonding.
- Solve Past 5 Years' JEE Main PYQs: This chapter has a high density of repeated patterns (example, isoelectronic/isostructural species, coordinate bonds in oxyacids). Solving PYQs from 2021 to 2026 will cover nearly every standard question model and help you understand the JEE Mains 2027 high weightage topics.
Commonly asked questions
NO, it is compulsory to attempt all questions in the JEE Main exam. The JEE Main exam has negative marking and candidates must answer only those questions for which they know the correct answer. Students must note that there are no minimum marks in JEE Main that students need to score. Students gets All India Rank based on the marks they secure in exam and gets admission based on that rank.
Yes, JEE Main exam has negative marking. 1 mark is deducted for every incorrect answer.
Yes, and in fact, in the JEE Main exam, the weightage of class 11 and topics is almost the same. Candidates have to study topics of both classes 11 and 12 with equal importance.
Paper 1 has 75 questions where Physics Chemistry and Mathematics, each section has 25 questions. Out of 25 questions, 20 are MCQs and five are numerical value questions. You must answer all 5 numerical value-type questions. All 20 multiple-choice questions are compulsory. Complete all 75 questions in 3 hours.
High Probability JEE Main 2027 Chemical Bonding and Molecular Structure Questions
Candidates can expect questions from the following topics in the JEE Main 2027 exam:
- MOT: Almost every single shift contains at least one question directly testing MOT configuration (electronic filling up to 20 electrons).
- Mixed Concept Matching: Questions frequently combine VSEPR geometry with Dipole Moment (example: "Which of the following square planar molecules has a net zero dipole moment?").
- Counting Questions: Numerical value sections heavily favour counting queries, such as total lone pairs present on central atoms in a given list of 4 - 5 interhalogen/xenon compounds.
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Student Forum
Anything you would want to ask experts?Answered Yesterday
Apeejay Stya University cutoff 2026 has been released for the General AI category. The closing rank for all the listed programmes stood at 5,99,000 indicating that there was no variation in the Round 1 cutoff across the mentioned B.Tech programmes. These programmes include B.Tech. in Computer Scienc
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At Apeejay Stya University the JEE Main cutoff 2026 Round 1 closing rank for the General-All India category was 5,99,000 across all the B.Tech programmes mentioned.
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No, JEE Mains is not an accepted entrance exam at R.V. College of Engineering. Candidates must appear in either KCET or COMEDK in order to apply for BE at RVCE.
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Contributor-Level 10
Answered 2 days ago
KL University Hyderabad does considers JEE Main score for admission in BTech. However, it is not compulsory. Aspirants with scores in JEE Advanced, Uni-Gauge or state-level Engineering entrance exams and merit in sports/ cultural activities can also get admission. Candidates can also appear for KLEE
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Yes, you can participate in Amrita CSAP even if you have not appeared for AEEE with JEE scores.
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Contributor-Level 8
Answered 3 days ago
I would say CSE at GFTI would be a better option if you are not sure about which branch
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Yes, you have a great chance of getting admission to MBM University, Jaipur with a 92 percentile as a general female candidate from Rajasthan, especially if you have secured SKIT Jaipur in the mock allotment.
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Contributor-Level 10
Answered 4 days ago
Yes, you have a great chance of getting admission to MBM University in certain branches with a 92 percentile in JEE Main, though getting top branches like CSE may be difficult for the general category.
As you have mentioned that you got SKIT in the mock allotment, which means your rank currently alig
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Contributor-Level 10
Answered 4 days ago
Yes, Galgotias University accepts JEE Main and CUET scores for B.Tech admissions. Students with JEE Main/JEE Advanced/CUET/SAT scores are given preference in the merit list, subject to meeting the Class 12 eligibility requirements. For B.Tech CSE, the current requirement is at least 60% in the speci
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Beginner-Level 5
Answered 5 days ago
No, candidates who fulfill Babu Banarasi Das University, Lucknow BTech eligibility criteria do not need to appear in JEE Main to qualify for admission.
However, JEE Main ranks are used to offer scholarships at BBDU, Lucknow. Thus, candidates can choose to appear in this exam for maximizing their cha
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