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Chemistry

Class 9

Chemistry for Class 9 (Matric Part 1, Class 9), Punjab board, following the new PECTAA book: notes, key terms, solved examples, short questions and MCQs, explained in English, Urdu and Roman Urdu. Every open lesson is free. A chapter with no lesson yet says Coming soon.

Start · What is Chemistry?

Chapters

  1. Chapter 1States of Matter and Phase Changes≈ 160 min

    0 of 8 lessons done

    Start with lesson 1 and take your time.

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  2. Chapter 2Atomic Structure≈ 80 min

    0 of 4 lessons done

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  3. Chapter 3Chemical Bonding≈ 150 min

    0 of 8 lessons done

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  4. Chapter 4Stoichiometry≈ 150 min

    0 of 8 lessons done

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  5. Chapter 5Energetics≈ 140 min

    0 of 7 lessons done

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  6. Chapter 6Equilibria≈ 95 min

    0 of 5 lessons done

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  7. Chapter 7Acid Base Chemistry≈ 110 min

    0 of 6 lessons done

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  8. Chapter 8Periodic Table and Periodicity≈ 110 min

    0 of 6 lessons done

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  9. Chapter 9Group Properties and Elements≈ 95 min

    0 of 6 lessons done

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  10. Chapter 10Environmental Chemistry≈ 105 min

    0 of 6 lessons done

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  11. Chapter 11HydrocarbonsComing soon
  12. Chapter 12Empirical Data Collection and AnalysisComing soon
  13. Chapter 13Laboratory and Practical SkillsComing soon

A taste of the free chapter

1.1 What is chemistry? One rock, eleven branches

Chemistry studies the properties, composition and structure of substances, the physical and chemical changes in matter, and the laws behind those changes. It is split into branches so that each can focus on one area.

Try one MCQ

The hazardous effects of shopping bags are studied in:

  1. (a) Geochemistry
  2. (b) Inorganic chemistry
  3. (c) Analytical chemistry
  4. (d) Environmental chemistry
Show answer

(d) Environmental chemistry studies the effects of chemicals released into air, soil and water, and the causes and solutions of pollution.

Open the free lesson →What is chemistry? One rock, eleven branches

How every lesson works

  1. Read: the problem first, then the one rule that solves it.
  2. Key terms: four ideas the board asks about, each with a “why”.
  3. Try it: an interactive you can play with, and a question you answer on screen.
  4. Model answers: board-style questions solved line by line.
  5. Common mistakes: the traps that cost marks every year.
  6. MCQs: five questions, each with the reason behind the answer.
  7. Quick revision: three points to remember before the exam.

What comes next

  • Every chapter of all 7 subjects of your year: Chemistry, Physics, Biology, Maths, Computer Science, English and Urdu.
  • Notes, model answers, common mistakes and MCQs for every lesson.
  • Every step in English, Urdu and Roman Urdu; switch any time.
  • More chapters of the new PECTAA books, added one by one as each is checked against the book.

Every open lesson is free. The rest is coming soon.

More chapters: coming soon

One book, all nine Punjab boards

The same Punjab textbook is used by the boards of Lahore, Rawalpindi, Gujranwala, Faisalabad, Multan, Sargodha, Bahawalpur, Dera Ghazi Khan, Sahiwal. These notes fit your board too.

Questions students ask

Are the lessons really free?
Yes. Every lesson that is open is free for everyone, with all its notes, model answers and MCQs. No sign-up needed to read it.
What about the other chapters?
They are listed in the order of the new PECTAA book and say Coming soon. We add them one by one, each checked against the book.
Does it match my board?
Yes. All nine Punjab boards use the same Punjab textbook, so the chapters, questions and MCQs here fit Lahore, Rawalpindi, Multan and every other Punjab board.
Can I study in Urdu?
Yes. Every explanation is in English, Urdu and Roman Urdu. Science terms stay in English, as they appear in your exam paper.