Question

what are physical changes ? Give examples​

Answer 1

Explanation:

Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.

For example:-  Some of the processes that cause physical changes include cutting, bending, dissolving, freezing, boiling, and melting.

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Answer 2

QUESTION

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What is a physical change?

Give example.

Answer:

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A change which occurs without a change in the composition and chemical nature of the substance is called a physical change. It means that there is a change only in the physical properties of the substance. Properties like colour, hardness, rigidity, fluidity, density, melting point and boiling point are known as physical properties. Melting of ice or boiling of water is a physical change because ice, water and water vapours are chemically the same substance that is H2O.

EXAMPLES

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• An ice cube melting into water in your drink.
• Freezing water to make ice cubes.
• Boiling water evaporating.
• Hot shower water turning to steam.
• Steam from the shower condensing on a mirror.

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