Question

define physical change and chemical change (explain please). ​

Answer 1

Explanation:

In first

it is the definition of physical change.

in second

it is the definition of chemical change

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Answer 2

Physical change:-

Physical change is a type of change where the physical properties of matter change. A change of state of matter, change in colour, odour, solubility, etc. all are examples of physical change.

During a physical change, neither the composition nor the chemical nature of matter is changed. During this change, molecules rearrange themselves without affecting the internal composition. A physical change doesn’t affect the chemical property. Examples:crystallisation.

Chemical change:-

A chemical change is a type of change where the chemical properties of matter change. It is commonly called a chemical reaction.

Different substances have different chemical property. According to this property, substances show variation in their reactivity. A chemical reaction results in a new product. During a chemical change, bonds between the molecules break and the composition of the substance change. In other words, chemical change leads to the breaking and making of bonds.Examples of Chemical Change:Combustion, rusting, fermentation, etc. are a few examples of chemical change.

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