Chemical Bonding & Molecular Structure is an important and high-weightage topic that is asked in the NEET UG 2025 exam. The topic carries approximately 10-12% weightage and candidates can expect 4 to 5 questions from this section in the NEET 2025 exam.
The Chemical Bonding & Molecular Structure chapter has a representation of how atoms combine to form molecules and most asked topics in Chemical Bonding & Molecular Structure are VSEPR Theory, Hybridization.
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Listed below is the list of Chemical Bonding & Molecular Structure questions with detailed solutions asked in NEET UG 2025 exam.
Question 1:
Match List-I with List-II:
List-I (Molecule) | List-II (Bond Enthalpy in kJ mol⁻¹)
(A) HCl → (I) 435.8
(B) N₂ → (II) 498
(C) H₂ → (III) 946.0
(D) O₂ → (IV) 431.0
Identify the correct answer from the options given below:
Options:
(A) A-III, B-IV, C-I, D-II
(B) A-IV, B-I, C-III, D-II
(C) A-IV, B-III, C-I, D-II
(D) A-IV, B-III, C-I, D-II
Question 2:
Amongst the following, the total number of species NOT having eight electrons around the central atom in its outermost shell is:
Given species: NH₃, AlCl₃, BeCl₂, CCl₄, PCl₅
Options:
(A) 2
(B) 4
(C) 1
(D) 3
Question 3:
Which of the following molecules represents the order of hybridisation sp², sp², sp, sp from left to right atoms?
Options:
(A) HC ≡ C – C ≡ CH
(B) CH₂ = CH – CH = CH₂
(C) CH₂ = CH – C ≡ CH
(D) CH₃ – CH = CH – CH₃
Question 4:
The correct order of energies of molecular orbitals of the N₂ molecule is:
Options:
(A) σ1s < σ*1s < σ2s < σ*2s < σ2pz < (π2px = π2py) < (π*2px = π*2py) < σ*2pz
(B) σ1s < σ*1s < σ2s < σ*2s < σ2pz < (π2px = π2py) < (π*2px = π*2py)
(C) σ1s < σ*1s < σ2s < σ*2s < (π2px = π2py) < (π*2px = π*2py) < σ2pz < σ*2pz
(D) σ1s < σ*1s < σ2s < σ*2s < (π2px = π2py) < σ2pz < (π*2px = π*2py) < σ*2pz
Question 5:
Which amongst the following is the incorrect statement?
Options:
(A) The bond orders of O₂⁺, O₂, O₂⁻, and O₂²⁻ are 2.5, 2, 1.5, and 1, respectively.
(B) C₂ molecule has four electrons in its two degenerate π molecular orbitals.
(C) H₂⁺ ion has one electron.
(D) O₂⁺ ion is diamagnetic.
Question 6:
Which of the following molecules is non-polar in nature?
Options:
(A) POCl₃
(B) CH₂O
(C) SbCl₅
(D) NO₂
Question 7:
Which of the following set of molecules will have zero dipole moment?
Options:
(A) Ammonia, beryllium difluoride, water, 1,4-dichlorobenzene
(B) Boron trifluoride, hydrogen fluoride, carbon dioxide, 1,3-dichlorobenzene
(C) Nitrogen trifluoride, beryllium difluoride, water, 1,3-dichlorobenzene
(D) Boron trifluoride, beryllium difluoride, carbon dioxide, 1,4-dichlorobenzene
Question 8:
BF₃ is a planar and electron-deficient compound. Hybridization and the number of electrons around the central atom, respectively, are
Options:
(A) sp² and 8
(B) sp³ and 4
(C) sp³ and 6
(D) sp² and 6
Question 9:
The hybridizations of atomic orbitals of nitrogen in NO₂⁺, NO₃⁻, and NH₄⁺ respectively are
Options:
(A) sp, sp³, and sp²
(B) sp², sp³, and sp
(C) sp, sp², and sp³
(D) sp², sp, and sp³
Question 10:
The correct geometry and hybridization for XeF₄ are
Options:
(A) Octahedral, sp³d²
(B) Trigonal bipyramidal, sp³d
(C) Planar triangle, sp³d³
(D) Square planar, sp³d²
NEET UG 2025 Chemistry Paper Exam Pattern
The NEET 2025 Chemistry section consists of 45 questions, which is 25% of the total paper. NEET Chemistry section is of total 180 marks.
| Section | Weightage (%) | Key Topics |
|---|---|---|
| Physical Chemistry | 30–35% | Thermodynamics, Electrochemistry, Chemical Kinetics, Equilibrium, and Solutions. |
| Inorganic Chemistry | 30–35% | Periodic Table, p-block, d-block, f-block elements, Coordination Compounds, and Chemical Bonding. |
| Organic Chemistry | 35–40% | Reaction mechanisms, Hydrocarbons, Alcohols, Phenols, Aldehydes, Ketones, Biomolecules, and Polymers. |
NEET 2025 Chemistry Chapter-Wise Weightage
| Unit | Weightage (%) | Class |
|---|---|---|
| Some Basic Concepts of Chemistry | 2–3% | Class 11 |
| Structure of Atom | 2–3% | Class 11 |
| Chemical Bonding and Molecular Structure | 5% | Class 11 |
| Thermodynamics | 5% | Class 11 |
| Equilibrium | 6% | Class 11 |
| Redox Reactions | 3% | Class 11 |
| The States of Matter | 3% | Class 11 |
| Solutions | 4% | Class 12 |
| Electrochemistry | 4–5% | Class 12 |
| Chemical Kinetics | 3% | Class 12 |
| Surface Chemistry | 2% | Class 12 |
| Classification of Elements and Periodicity | 2% | Class 11 |
| The p-Block Elements | 5% | Class 12 |
| The d- and f-Block Elements | 4% | Class 12 |
| Coordination Compounds | 5% | Class 12 |
| Haloalkanes and Haloarenes | 3% | Class 12 |
| Alcohols, Phenols, and Ethers | 4% | Class 12 |
| Aldehydes, Ketones, and Carboxylic Acids | 4–5% | Class 12 |
| Amines | 2–3% | Class 12 |
| Biomolecules | 3% | Class 12 |
| Polymers | 2% | Class 12 |
| Chemistry in Everyday Life | 2% | Class 12 |
NEET Last 5 Year Question Papers Pdf For NEET 2025 Preparation (2024 - 2017)
You can download the NEET previous year question paper pdfs with solutions from the table given below:
| NEET UG Previous Question Papers By NTA | Download PDF |
|---|---|
| NEET Exam 2024 | Check Here |
| NEET Exam 2023 | Check Here |
| NEET Exam 2022 | Check Here |
| NEET Exam 2021 | Check Here |
| NEET Exam 2020 | Check Here |
| NEET Exam 2019 | Check Here |
| NEET Exam 2018 | Check Here |
| NEET Exam 2017 | Check Here |
Difficulty Analysis Of NEET UG Chemistry:
| Section | Difficulty Level | Key Topics |
|---|---|---|
| Physical Chemistry | Moderate to Difficult | Chemical Kinetics, Thermodynamics, Electrochemistry, States of Matter, Surface Chemistry, Solutions |
| Organic Chemistry | Moderate | Hydrocarbons, Alcohols, Phenols and Ethers, Organic Chemistry based on Functional Groups, Biomolecules, Polymers, Chemistry in Everyday Life |
Frequently Asked Questions:-
1. Is chemical bonding and molecular structure important for NEET?
Yes, chemical bonding and molecular structure are significant for NEET. These are very important topics to learn the basics of Chemistry, and questions based on these concepts often come in the exam. You can go through Chemical bonding and molecular structure Important Questions and Chemical bonding and Molecular Structure NCERT PDF to prepare well for the exam. Also, Journal of molecular structure impact factor.
2. What do you mean by hybridization?
Hybridization definition in Chemistry refers to the concept of mixing atomic orbitals to form new hybrid orbitals that influence molecular shape and bonding. It helps explain the geometry of molecules where simple valence bond theory falls short.
3. What is sp, sp2, and sp3 hybridization?
- Sp hybridization: This occurs when one s orbital and one p orbital mix, forming two sp hybrid orbitals. The molecule adopts a linear shape with a bond angle of 180°.
- What is sp2 hybridization: In this case, one s orbital and two p orbitals combine, forming three sp2 hybrid orbitals arranged in a trigonal planar shape (120° bond angle).
- Sp3 hybridization: When one s orbital and three p orbitals mix, four sp3 hybrid orbitals form, leading to a tetrahedral structure with a bond angle of 109.5°.
4. What is hybridization by topper?
Many students refer to reliable sources like Hybridization PDF documents and study materials by educational platforms like Topper. These resources provide detailed explanations, diagrams, and examples of hybridization.
5. What are the 4 types of hybridization?
There are four main types of hybridization:
- Sp hybridization – Linear shape, seen in molecules like BeCl₂.
- Sp2 hybridization – Trigonal planar shape, found in BF₃.
- Sp3 hybridization – Tetrahedral structure, as in CH₄.
- Types of hybridization with examples – Other variations include sp3d and sp3d2 hybridization, which result in trigonal bipyramidal and octahedral shapes, respectively.
6. What is a chemical bonding structure?
The chemical bonding structure is defined as the assembly of atoms or ions in a compound or a molecule, whose atoms are glued together by covalent, ionic, or metallic bonds.
7. What are the 4 types of chemical bonds?
There are four kinds of chemical bonds:
Covalent Bond
Ionic Bond
Metallic Bond
Hydrogen Bond
8. How to study chemical bonding and molecular structure?
In order to learn chemical bonding and molecular structure, one needs to know about the various types of chemical bonds, molecular geometry, and electron configurations. You can go through Chemical bonding and molecular structure notes, Chemical bonding and molecular structure class 11 notes, and Chemical bonding and molecular structure pdf to obtain detailed material on the topic. Also, going through Chemical bonding and Molecular Structure NCERT Solutions can assist in learning intricate concepts.
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