Why decomposition reaction is opposite of combination reaction


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Why are decomposition reaction called the opposite of combustion reaction ? write equations for these reaction

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Answered by admin @



Hey there!

In a combination reaction two or more substances are combined to form new substance while in the decomposition reaction one substance decomposes into two or more substances. Hence, the decomposition reactions are called opposite of combination reactions.

CaCO3 (s) ⇨ CaO (s) + CO2 (g) Decomposition reaction

H2 (g) + Cl2 ⇨ 2HCl (g) Combination reaction

Hope it help

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