Physical Chemistry is one of the most scoring yet concept-based sections of Class 12 Chemistry. Every year, CBSE board exams as well as competitive exams like NEET, JEE Main, and CUET include a significant number of questions from Physical Chemistry.
That’s why students are actively searching for Class 12 Physical Chemistry Notes PDF that are chapter-wise, NCERT-based, formula-focused, and exam-ready.

In this blog post, you will get:

• Chapter-wise Class 12 Physical Chemistry Notes
• Important formulas & concepts
• Most asked questions
• Board & competitive exam preparation tips

This guide is perfect for revision, last-minute preparation, and concept clarity.

Class 12 Physical Chemistry Notes PDF | Chapter Wise NCERT & Important Questions

📘 Why Physical Chemistry is Important for Class 12 Students?

Physical Chemistry focuses on numerical problems, laws, graphs, and formulas, making it highly scoring if prepared correctly.

Key Benefits:

• Direct formula-based questions in board exams
• High weightage in NEET & JEE
• Improves problem-solving skills
• Easy marks with proper revision

📑 Class 12 Physical Chemistry Chapter-Wise Notes (NCERT Based)

🔹 Chapter 1: Solid State

Key Concepts:

• Types of solids (Crystalline & Amorphous)
• Unit cell & packing efficiency
• Density of unit cell
• Point defects (Schottky & Frenkel)

Important Formulas:

• Density = (Z × M) / (a³ × Nₐ)
• Packing efficiency (FCC) = 74%

Exam Tip:
Numericals from density & packing efficiency are frequently asked.

🔹 Chapter 2: Solutions

Key Concepts:

• Types of solutions
• Concentration terms (Molarity, Molality, Mole fraction)
• Raoult’s Law
• Colligative properties

Important Formulas:

• Molarity = Moles of solute / Volume (L)
• ΔTb = Kb × m
• ΔTf = Kf × m

Most Asked Topic:
Elevation of boiling point & depression of freezing point

🔹 Chapter 3: Electrochemistry

Key Concepts:

• Electrochemical cells
• Nernst equation
• Conductance
• Electrolysis

Important Formulas:

• Ecell = E°cell – (0.0591/n) log Q
• Kohlrausch’s Law
• Faraday’s Laws of Electrolysis

Board Focus:
Numericals + derivation of Nernst equation

🔹 Chapter 4: Chemical Kinetics

Key Concepts:

• Rate of reaction
• Order & molecularity
• Integrated rate equations
• Half-life

Important Formulas:

• Rate = k[A]ⁿ
• t½ (First order) = 0.693 / k

High-Scoring Chapter ✔

🔹 Chapter 5: Surface Chemistry

Key Concepts:

• Adsorption (Physisorption & Chemisorption)
• Colloids
• Catalysis

Important Points:

• Freundlich adsorption isotherm
• Tyndall effect
• Emulsions

Exam Nature:
Mostly theory & one-mark questions

📌 Class 12 Physical Chemistry Important Questions (Repeated)

🔸 Very Short Answer Questions

1. Define molarity.
2. What is electrochemical series?
3. What is half-life of a reaction?

🔸 Short Answer Questions

1. State Raoult’s law.
2. Explain Kohlrausch’s law.
3. Define order of reaction.

🔸 Numerical Based Questions

1. Calculate molarity of solution.
2. Find half-life of first-order reaction.
3. Calculate Ecell using Nernst equation.

📄 Class 12 Physical Chemistry Formula Sheet (Must Revise)

• Density of unit cell
• Raoult’s law equations
• Nernst equation
• Rate law equations
• Half-life formulas
• Conductance relations

👉 Tip: Make a separate formula notebook for quick revision.

🎯 How to Study Physical Chemistry Effectively?

✔ Read NCERT line by line
✔ Practice numericals daily
✔ Memorize formulas & units
✔ Solve previous year questions
✔ Revise chapters weekly

❓FAQs)

Q1. Is Physical Chemistry difficult for Class 12?

No, if concepts and formulas are clear, it is one of the most scoring sections.

Q2. Are NCERT notes enough for board exams?

Yes, NCERT-based notes are sufficient for CBSE boards.

Q3. Which chapter is most important in Physical Chemistry?

Electrochemistry, Solutions, and Chemical Kinetics.

Q4. Are these notes useful for NEET & JEE?

Yes, these notes are board + competitive exam oriented.

Q5. How to score full marks in Physical Chemistry?

Practice numericals, revise formulas, and solve PYQs.

🔍 Conclusion-Class 12 Physical Chemistry Notes PDF

Agar aap in Class 12 Physical Chemistry Important Questions ko acche se prepare kar lete ho, to 40–45 marks Chemistry me secure karna kaafi easy ho jata hai.

🔥 Class 12 Physical Chemistry Important Questions (Most Repeated)

📘 Chapter 1: Solid State – Important Questions

Very Short Answer (1 Mark)

1. What is a unit cell?
2. Define packing efficiency.
3. Name the defect responsible for non-stoichiometry.
4. What type of solid is diamond?
5. Define coordination number.

Short Answer (2–3 Marks)

1. Differentiate between crystalline and amorphous solids.
2. Explain Schottky defect with example.
3. Why is density of NaCl less than expected?

Numerical Questions

1. Calculate density of FCC unit cell when edge length is given.
2. Find packing efficiency of BCC structure.

📘 Chapter 2: Solutions – Important Questions

Very Short Answer

1. Define molarity and molality.
2. What are colligative properties?
3. What is ideal solution?

Short Answer

1. State Raoult’s law.
2. Why does molality not change with temperature?
3. Explain relative lowering of vapour pressure.

Long Answer / Numericals (Frequently Asked)

1. Calculate molarity of a solution when mass and volume are given.
2. Calculate depression in freezing point using Kf.
3. Determine molar mass using colligative properties.

🔥 Most Repeated Topic:
Depression in freezing point & elevation of boiling point

📘 Chapter 3: Electrochemistry – Important Questions

Very Short Answer

1. Define electrochemical cell.
2. What is standard electrode potential?
3. Write Nernst equation.

Short Answer

1. Explain Faraday’s first law of electrolysis.
2. Define molar conductivity.
3. What is cell constant?

Long Answer / Numericals

1. Derive Nernst equation for cell reaction.
2. Calculate EMF of a cell at given concentration.
3. Calculate conductance using Kohlrausch’s law.

🔥 High Weightage Chapter for Boards & NEET

📘 Chapter 4: Chemical Kinetics – Important Questions

Very Short Answer

1. Define rate of reaction.
2. What is order of reaction?
3. What is half-life?

Short Answer

1. Differentiate between order and molecularity.
2. Define first-order reaction.
3. Write integrated rate law for first-order reaction.

Numerical Questions (Very Important)

1. Calculate half-life of a first-order reaction.
2. Find rate constant using given data.
3. Determine order of reaction graphically.

🔥 Most Scoring Chapter in Physical Chemistry

📘 Chapter 5: Surface Chemistry – Important Questions

Very Short Answer

1. What is adsorption?
2. Define colloid.
3. What is Tyndall effect?

Short Answer

1. Differentiate between physisorption and chemisorption.
2. Explain Freundlich adsorption isotherm.
3. What is emulsification?

Long Answer

1. Explain role of catalyst in chemical reactions.
2. Write applications of colloids.

📌 5 MOST IMPORTANT NUMERICAL QUESTIONS (Exam Favourite)

1. Calculate density of unit cell using given data.
2. Calculate molarity / molality of solution.
3. Calculate EMF of electrochemical cell using Nernst equation.
4. Find half-life of first-order reaction.
5. Calculate depression in freezing point.

🎯 Board Exam Tip (Very Important)

✔ At least 2 numericals come from Physical Chemistry
✔ Formulas carry direct marks
✔ NCERT examples are frequently repeated
✔ Practice previous year questions

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Class 12 Solutions Notes