Question

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Answer 1

Answer:

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• With example explain physical and chemical changes.

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A physical change is a change to the physical—as opposed to chemical—properties of a substance. They are usually reversible. The physical properties of a substance include such characteristics as shape color, texture, flexibility, density, and mass.

Examples of physical change include changes in the size or shape of matter. Changes of state—for example, from solid to liquid or from liquid to gas—are also physical changes. Some of the processes that cause physical changes include cutting, bending, dissolving, freezing, boiling, and melting.

A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust.

Answer 2

Answer:

A Chemical Change results from a chemical reaction, which a physical change is when matter changes forms but not chemical identity.Examples of chemical changes are Burning, Cooking, Rusting and Rotting.Example of physical changes are boiling, melting, freezing, and shredding.

Explanation:

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