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Distinguish between: a) Physical change and …

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Distinguish between: a) Physical change and Chemical change any 3 point

    • Posted by Vedant Bhadra 5 years, 3 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Yogita Ingle 5 years, 3 months ago

    Physical Change Chemical Change
    When a substance undergoes a physical change, its composition remains the same despite its molecules being rearranged. When a substance undergoes a chemical change, its molecular composition is changed entirely. Thus, chemical changes involve the formation of new substances.
    Physical change is a temporary change. A chemical change is a permanent change.
    A Physical change affects only physical properties i.e. shape, size, etc. Chemical change both physical and chemical properties of the substance including its composition
    A physical change involves very little to no absorption of energy. During a chemical reaction, absorption and evolution of energy take place.
    Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.
    Generally, physical changes do not involve the production of energy. Chemical changes usually involve the production of energy (which can be in the form of heat, light, sound, etc.)

    1Thank You

    Vedant Bhadra 5 years, 3 months ago

    Pls tell me

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