A physical change is temporary. A physical change is generally reversible. In such a change no new substance is formed.
Forms of energy, such as heat, light and electricity, are neither emitted nor absorbed in a physical change.
Some changes are in the form of chemical reactions, which lead to the formation of new substances. These are called chemical changes. These changes may be accompanied by the emission of heat, light or sound, a change in colour, or the formation of a gas.
A chemical change is permanent and A new substance is formed. Forms of energy, such as heat, light or electricity, may be emitted or absorbed during a chemical reaction.
A chemical change is generally irreversible.
View NCERT Solution
- Chapter-wise tests to help you assess your preparation status after studying a chapter.
- Detailed solutions for all the tests help students compare their solutions with model answers provided.
- Unlimited tests for extensive practice.
- Notes are organized chapter-wise for quick and easy reference.
- Available in easily downloadable PDF format for easy downloading and printing.
- High-quality illustrations and supporting diagrams aid in quick understanding.
- Point-wise summary of key concepts in a chapter to ensure that you cover all topics.
- Textbook revise are available in PDF format for easy download and printing.
- Concepts are explained in easy language accompanied with high-quality graphics.