why is decomposition reaction called opposite of combination reaction???
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Explanation:
Combination reaction is a reaction in which two or more substances combine together to form a single substance. For example,
Fe + S → FeS
Decomposition reaction is a reaction in which a substance is broken down into two or more substances. For example,
2HgO → 2Hg + O2
CaCO3 → CaO + CO2
CuSO4 . 5H2O → CuSO4 + 5H2O
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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.
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