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 www.sakshieducation.com  Chapter -2 Chemical Reactions and Equations SYNOPSIS In nature, we come across temporary, permanent, natural and manmade changes. A permanent change in which new substance or substances formed with completely unlike those of the original substances is called a chemical change. Chemical changes are represented by formulae or equation is known as chemical equations. All the chemical equations must balance, because atoms are neither created nor destroyed in chemical reactions. Chemical reactions are gen