Question

1. What is a (a) physical change, and (b) chemical change? Give two examples of physical changes and two examples of chemical changes.​

Answer 1

Answer:

Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions

Eg. Rotting, burning, cooking, and rusting are all further types of chemical changes.

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.

Answer 2

Answer:

Physical change:- A change in which no new substance is formed is called Physical change ..

Ex of Physical change are:-

1) tearing of paper

2) melting of ice

3) freezing of water

chemical change:- A change in which a new substance is formed is called chemical change..

Ex of Chemical change are:-

1) cooking food

2) growth of plant's

3) burning of paper and fuels

Explanation:

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