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 In combination reactions, two or more substances combine to form a new compound. Only one product is obtained in such reactions. The reactants in such reactions can be elements as well as compounds. The general equation used to represent a combination reaction is: A + Z AZ For example, calcium oxide reacts vigorously with water to produce calcium hydroxide. A large amount of heat is also evolved during this process, which increases the temperature of the system. Hence, the combination of calcium oxide and water is exothermic in nature.
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It is a reaction in which two or more atoms combine to form a single product.
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