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1. Physical changes and Chemical changes.
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Physical changes
A change in which the substance retains its identity and changes in form or state without altering in composition.
A physical change is
- temporary
- easily reversible
- with no new substance formed and
- composition and properties of original substance is not altered
Chemical changes
A change in which the substance loses its identity and produces one or more new substance by change in its composition.
A chemical change is
- permanent
- not easily reversible
- with a new substance formed and
- composition and properties of original substance is altered
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