Question

Differentiate between :-

1) Chemical and physical change.​

Answer 1

Physical change is a temporary change. A chemical change is a permanent change. ... Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.

Answer 2

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Chemical Change :-

• Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions.

• Examples of chemical changes are burning, souring milk etc.

Physical Change :-

• Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.

• Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.

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