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Punjab Board Class 11 Chemistry — Formula Sheet

Punjab Board Class 11 Chemistry formula sheet, chapter by chapter — 9 formulas across 3 chapters. Follows the PSEB syllabus.

How to Use the Formula Sheet

  1. Write, don't just read — writing each formula out helps it stick.
  2. Understand the derivation — you can rebuild a formula you half-remember.
  3. Group related formulas — link the ones that build on each other.
  4. Test yourself — cover the sheet and write the formulas from memory.

Chapter-Wise Formulas — 3 Chapters

1

Some Basic Concepts of Chemistry

2 entries
Scientific Notation: Any number expressed as N × 10ⁿ where 1 ≤ N < 10 and n is an integer (positive or negative).
Law 1 – Conservation of Mass (Lavoisier, 1789): In a chemical reaction, mass of reactants = mass of products. Matter is neither created nor destroyed.
The full Some Basic Concepts of Chemistry formula sheet
2

Structure of Atom

2 entries
EM radiation travels through vacuum at speed of light c = 3.0 × 10⁸ m/s.
Hydrogen spectrum: Balmer series (visible, n₁=2, n₂=3,4,5...), Lyman (UV, n₁=1), Paschen (IR, n₁=3), Brackett (IR, n₁=4), Pfund (IR, n₁=5).
The full Structure of Atom formula sheet
5

Thermodynamics

5 entries
WORK (w): When external pressure pex compresses a gas from Vi to Vf, work done on system = w = −pex × ΔV.
At constant pressure: ΔH = qp. Heat absorbed at constant pressure equals change in enthalpy.
Relationship: ΔH = ΔU + ΔngRT, where Δng = moles of gaseous products − moles of gaseous reactants.
Work (w) in chemistry primarily refers to pressure-volume work: w = -pΔV.
Calorimetry measures heat changes: q = CΔT, where C is heat capacity.
The full Thermodynamics formula sheet

Get chapter-wise help for Punjab Board Class 11 Chemistry

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Frequently Asked Questions

Where can I find Punjab Board Class 11 Chemistry Formula Sheet?

This page has formula sheet for 3 chapters of Punjab Board Class 11 Chemistry for the 2026-27 session. Each chapter links to its own page with the full set.

Go through the syllabus first, then work chapter by chapter: learn the ideas, practise questions, and revise with notes and flashcards. Leave time at the end to revise every chapter once more under timed conditions.

Learn the formulas you use most first, and understand what each symbol means so you can apply them. Knowing where a formula comes from helps you rebuild it if you forget it in the exam.

Browse Formula Sheet by Chapter

3 chapters

1

Some Basic Concepts of Chemistry

2

Structure of Atom

5

Thermodynamics

More Chemistry Resources

Punjab Board Class 11

Practice Quiz

Test yourself with quick quizzes

Important Questions

Exam-style questions with answers

Revision Notes

Key concepts and quick revision points

Chapter Summary

Understand each chapter at a glance

Concept Maps

Diagrams showing how topics connect

Flashcards

Quick-fire cards for active recall practice

Syllabus

Chapter list and the topics in each

Other Punjab Board Class 11 Subjects

Mathematics