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Physical and Chemical Changes — Syllabus

ICSE · Class 8 · Chemistry

What Physical and Chemical Changes covers in ICSE Class 8 Chemistry: 4 topics, for the 2026-27 session. Part of the ICSE Class 8 Chemistry syllabus.

43 questions32 flashcards5 concepts

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4 Topics · ICSE Class 8 Chemistry · 2026-27

Topics in Physical and Chemical Changes

1

Types of Changes

  • Slow changes take hours, days, months, or even years to occur.
  • Fast changes take place in a very short time.
  • Natural changes happen by themselves in nature.
2

Physical Changes

  • In a physical change no new substance is formed.
  • A physical change involves temporary changes in physical properties without change in chemical composition.
  • Ice and water have the same chemical composition, H2O.
3

Chemical Changes

  • In a chemical change, a new substance with different properties is formed.
  • Chemical changes are permanent and irreversible.
  • Chemical changes cannot be reversed by simple physical methods.
4

Physical Change and Chemical Change Compared

  • Physical change: no new substance is formed.
  • Chemical change: a new substance is formed.
  • Physical change: chemical composition remains the same.

Key Concepts

Central concept: Changes in surrounding substances and materials can be classified as physical changes or chemical changes, along with other common classifications such as slow or fast, natural or man-made, periodic or non-periodic, and reversible or irreversible.

Types of changesPhysical changesChemical changesReactions and equationsEnergy changesCandle burningActivities and observations

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Frequently Asked Questions

What are the important topics in Physical and Chemical Changes for ICSE Class 8 Chemistry?
Key topics in Physical and Chemical Changes include Types of Changes, Physical Changes, Chemical Changes, Physical Change and Chemical Change Compared. Study these first, then practise questions on each for Class 8 exams.
How should I revise Physical and Chemical Changes for Class 8 exams?
Learn the core ideas first, then work through the 43 practice questions on Physical and Chemical Changes. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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