Question

What is the physical change and examples?

Answer 1

Hint: we all have noticed that everything around us undergoes certain changes. These changes may include the change of state of matter, size, color, texture and density. For example- melting of ice, boiling of water and cutting of hair etc.

Complete answer:
Now, let’s understand the physical changes in complete detail.
We all know what a matter is. Anything that has mass and it occupies space is termed as matter. Matter has some physical as well chemical properties. Physical properties are related to its appearance which include color, taste, odour, solubility, melting and boiling points etc. whereas chemical properties exhibited during chemical reactions include pH, reactivity and their chemical compositions.
Everything around us undergoes certain changes. These changes can be either physical change or chemical change.
Physical changes- It is a type of change that occurs when the physical properties like state of matter, odour, colour, solubility etc. changes. It does not have any effect on the chemical composition as well as the chemical nature of the matter. Molecules just rearrange themselves during this change. It is a reversible process. This change does not involve the formation of new products. Here, energy is neither absorbed nor evolved. Examples- melting of ice, freezing of water, boiling of water, crushing of a paper, sublimation of dry ice etc.

Note :
Remember the chemical composition or its internal properties are not affected by physical changes. Only the physical traits of the substances change. Let’s have a look at chemical changes, you should know about it.
Chemical changes- It is a type of change that occurs when the chemical properties of the matter changes. It affects the chemical composition and chemical properties of the matter. It is an irreversible process. This type of change leads to the formation of new products. Here, energy is either absorbed or evolved. Example- combustion, rusting, fermentation etc.