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Question
Define a combination reaction. Give one example of an exothermic combination reaction.
Solution
A chemical reaction in which 2 or more reactants combine to form a single product, the reaction is known as combination reaction. Most of the combination reactions are exothermic because they involve the formation of new bonds. For example,
\[\ce{H2_{(g)} + Cl2_{(g)} -> 2HCl_{(g)}}\]
\[\ce{SiO2_{(s)} + CaO_{(s)} -> CaSiO3_{(s)}}\]
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