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What is a combination reaction?

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A reaction where two or more reactants combine to form a single product.

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Definition

‘‘Decomposition reaction”.

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The chemical reaction in which two or more products are formed from a single reactant is a ‘‘Decomposition reaction”.

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calcium carbonate undergoes decomposition reaction and the carbon dioxide gas formed turns the lime water milky

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CaCO3 (s) CaO(s) + CO2