Question

What is a physical change?​

Answer 1

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• A usually reversible change in the physical properties of a substance, as size or shape

• A physical change is a type of change in which the form of matter is altered but one substance is not transformed into another. The size or shape of matter may be changed, but no chemical reaction occurs. Physical changes are usually reversible.

Answer 2

Answer :

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• Physical change is a change in which only the shape or size change but not the chemical composition.

• It only changes the appearance of the object, but not the main composition. Some physical properties like as : changing into gas, change to crystal form, turn into durability, Melting, etc.

• Changes occur in some properties like as size, shape, state or colour (sometime) of any object is called as Physical Changes.

Example :

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Property of changing state :

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• $\small \boxed { \bf{ice}} \\ \downarrow \\ \boxed { \bf{water}}$

Property of changing size :

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• $\small \boxed { \bf{glass}} \\ \downarrow \\ \boxed { \bf{broken \: glass}}$

Property of changing shape :

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• $\small \boxed { \bf{can}} \\ \downarrow \\ \boxed { \bf{crushed \: can}}$

Property of changing colour :

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• $\small \boxed { \bf{solid \: sulfur}} \\ \downarrow \\ \boxed { \bf{liquid \: sulfur}}$