what do you mean by chemical reaction
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Explanation: Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds
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◆ Chemical change:
➪It is defined as the process in which atoms of one or more substances are rearranged or combined to form a new substance. When a substance undergoes a chemical change, the chemical properties of the substance changes and it is transformed into a new substance with different chemical composition.
➪Chemical changes are usually irreversible. It is generally indicated by evolution of gas and precipitate formation.
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