Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.
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Answer:
because in combination two reactants combine to form a single product where as in decomposition reaction a single reactant breaks up to give two or more products
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Explanation:
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.
- Decomposition reaction CaCO3 (s) ⇨ CaO (s) + CO2 (g)
- Combination reaction H2 (g) + Cl2 ⇨ 2HCl (g)
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