Difference between physical and chemical changes.
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A chemical change is a permanent change. A Physical change affects only physical properties i.e. shape, size, etc. ... 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.
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Explanation:
Physical Changes are those changes in which molecular composition of substance is not changing chemically but a new substance is formed.
Example- melting of wax.
Chemical changes are those in which molecular composition of changed chemically like dissolving salt in water.
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