Question

Define chemical change in very short way.

Answer 1

Answer:

A chemical change (chemical reaction) is a change of materials into other, new materials with different properties, and one or new substances are formed. Burning of wood is a chemical change as new substances which cannot be changed back (e.g. carbon dioxide) are formed.

Answer 2

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It is the change in which new substances having different compositions are produced. It is irreversible and is always accompanied by heat change.

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