Question

What is physical and chemical change write one one example​

Answer 1

Physical change: A physical change is defined as a temporary change in the physical characteristics of a substance such as state, shape, size, colour etc.change but the composition of the substance does not change and no new substances are formed.

Ex: Glowing of an electric bulb.

Chemical change: Chemical changes are permanent changes in which the composition and properties of the substances change and new substances are formed.

Ex: Burning of paper.

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Answer 2

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➤ Chemical change :-

☛ A permanent change ,in which the physical and chemical properties of matter changes and new substance are formed which do not get back into their original form by reversing the reaction is called chemical change.

For example :- The burning of coal or wood, the curdling of milk, forming of rust on iron etc.

➤ Physical change:-

☛ A temporary change,in which only the physical properties of the matter change and no new matter is formed and by reversing the reaction the matter changes into it's previous form is called physical change.

For example :- The melting of solid wax,the melting of ice etc.