Physical Chemistry Chapters for NEET 2025 with Weightage

The Physical Chemistry chapters for NEET 2025 must be known well by the students preparing for the entrance exam. There has been a revision in the NEET syllabus. Along with the change in syllabus, the weightage has also changed. The students must carefully read the weightage of marks for each chapter.

The exam pattern of NEET includes 45 questions in the Chemistry section. The examinees will have to answer 45 questions out of the total 45 questions. 9 units from the old syllabus have been deleted to form the new syllabus.

The deleted units include those in Physical, Organic, and Inorganic chemistry. The date for NEET exam 2025 has been officially announced to take place on May 4, 2025.

The entrance exam is conducted by the National Testing Agency (NTA). The official syllabus for the exam is was released on the official website. However, the students must start their revision work while sticking to the weightage.

Physical Chemistry Chapters for NEET

The syllabus for NEET consists of chapters from Class 11 as well as Class 12. The table below shows the weightage for the NEET Physical Chemistry chapters present in Classes 11 and 12.

The chapters included in the Physical Chemistry syllabus for class 11 are:

1. Mole Concept
2. Atomic Structure & Nuclear Chemistry
3. Gaseous State
4. Thermodynamics & Thermochemistry
5. Chemical Equilibrium
6. Ionic Equilibrium
7. Redox Reactions

The chapters in the Physical Chemistry syllabus for class 12 are:

1. Solid State
2. Solutions & Colligative Properties
3. Electrochemistry
4. Chemical Kinetics
5. Surface Chemistry

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Physical Chemistry for NEET 2025 Weightage

This section shares the chapter-wise weightage for the chapters included in the Physical Chemistry section of NEET Chemistry paper. It must be noted that the percentage shared below is tentative.

Weightage of Physical Chemistry Chapters for NEET: Class 11

The weightage for chapters from class 11 are:

Weightage of Physical Chemistry Chapters for NEET: Class 12

The weightage for chapters from class 12 are:

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NEET Physical Chemistry 2025 Syllabus: Most Important Chapters

While it is important to prepare with the complete syllabus for the exam, there are certain chapters that carry extra weight. These chapters must be prepared thoroughly, leaving no topic untouched.

The important chapters and the topics covered under these have been mentioned below. The students preparing for NEET 2025 must make a special note of this:

Chemical Kinetics

• Rate of chemical reaction
• Factors affecting rate of reaction
• Concentration, temperature, pressure, and catalyst
• Elementary and complex reactions
• Order and molecularity of reactions
• Rate law, rate constants and its units
• Differential and integral forms of zero and first-order reactions, their characteristics and half-lives
• Effect of temperature on the rate of reactions
• Arrhenius theory
• Activation energy and its calculation
• Collision theory of bimolecular gaseous reactions (no derivation)

D and F Block Elements

• General introduction
• Electronic configuration
• Occurrence and characteristics
• General trends in properties of the first-row transition elements - physical properties, ionization enthalpy, oxidation states, atomic radii, colour, catalytic behaviour, magnetic properties, complex formation, interstitial compounds, alloy formation
• Preparation, properties and uses of K2Cr207 and KMn04

Chemical Bonding & Molecular Structure

• Kossel-Lewis approach to chemical bond formation
• Concept of ionic and covalent bonds
• Ionic Bonding: Formation of ionic bonds
• Factors affecting the formation of ionic bonds
• Calculation of lattice enthalpy
• Covalent Bonding
• Concept of electronegativity
• Fajan's rule, dipole moment
• Valence Shell Electron Pair Repulsion (VSEPR) theory and shapes of simple molecules
• Quantum mechanical approach to covalent bonding
• Valence bond theory - its important features
• Concept of hybridization involving s, p, and d orbitals
• Resonance
• Molecular Orbital Theory - Important features
• LCAOs, types of molecular orbitals (bonding, antibonding), sigma and pi-bonds
• Molecular orbital electronic configurations of homonuclear diatomic molecules
• Concept of bond order, bond length, and bond energy
• Elementary idea of metallic bonding
• Hydrogen bonding and its applications

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Equilibrium

• Meaning of equilibrium
• Concept of dynamic equilibrium
• Equilibrium (physical process): Solid-liquid, liquid - gas and solid-gas equilibria
• Henry's law
• General characteristics of equilibrium involving physical process
• Equilibrium (chemical process): Law of chemical equilibrium, equilibrium constants (Kp and Kc) and their significance, the significance of ΔG and ΔG° in
• chemical equilibrium, factors affecting equilibrium concentration, pressure, temperature, the effect of catalyst
• Le Chatelier's principle
• Ionic equilibrium: Weak and strong electrolytes, ionization of electrolytes
• Various concepts of acids and bases (Arrhenius and Bronsted-Lowry and Lewis) and their ionization
• Acid-base equilibria (including multi-stage ionization) and ionization constants
• Ionization of water, PH scale, common ion effect,
• Hydrolysis of salts and PH of their solutions
• Solubility of sparingly soluble salts and solubility products
• Buffer solutions

Atomic Structure

• Nature of electromagnetic radiation
• Photoelectric effect
• Spectrum of the hydrogen atom
• Bohr model of a hydrogen atom
• Postulates
• Derivation of the relations for the energy of the electron and radii of different orbits
• Limitations of Bohr's model
• Dual nature of matter and light
• de Broglie's relationship
• Heisenberg uncertainty principle
• Elementary ideas of quantum mechanics
• Quantum mechanics
• Quantum mechanical model of the atom & its important features
• Concept of atomic orbitals as one-electron wave functions
• Variation of Ψ and Ψ 2 with r for 1s and 2s orbitals
• Various quantum numbers (principal, angular momentum, and magnetic quantum numbers) and their significance
• Shapes of s, p, and d - orbitals, electron spin and spin quantum number
• Rules for filling electrons in orbit is - Aufbau principle
• Pauli's exclusion principle and Hund's rule
• Electronic configuration of elements
• Extra stability of half-filled and completely filled orbitals

NEET Chemistry 2025 Syllabus for Class 11 & Class 12

The students must be very well acquainted with the syllabus before starting their preparation. The chemistry syllabus for NEET 2025 includes three sections - Physical Chemistry, Organic Chemistry, and Inorganic Chemistry.

• Physical Chemistry: The Physical Chemistry section consists of numerical-problem solving. This section involves solving numerical problems such as the molecular weight, atomic weight, empirical weight and other related problems. This section constitutes 32% of the total questions in the Chemistry paper.
• Organic Chemistry: This section of Chemistry includes the nomenclatures and other organic concepts. This section constitutes 30% of the total questions in the Chemistry paper.
• Inorganic Chemistry: This constitutes the major part of the Chemistry paper. Inorganic Chemistry carries 38% of the total questions.

The total marks allotted to the Chemistry paper in NEET is 180 marks. The candidates must know the topics thoroughly so that they miss out on nothing. It is advisable for the students to be thorough with the syllabus and weightage for all the chapters.

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