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Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.
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The substance which undergoes bound breaking while taking port in a chemical reaction is called reactant. <br> (2) The substance formed as a result of a chemical reaction by formation of new bonds is called product. <br> (3) Example : In a chemical reaction, the formation of carbon dioxide gas takes place by combustion of coal in air. In this reaction, coal (carbon) and oxygen (from air) are the reactants while carbon dioxide is the product .
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