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What is chemical change?
Chemical changes occur when a substance combines with another to form a new substance, it is also called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions. Characteristic of Chemical Changes are: 1. Change is permanent. 2. New substances are formed with entirely different physical and chemical properties. 3. Change can’t be reversed by simple physical method. Ex- cooking, baking. 4. Energy is released or absorbed during a chemical change.
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