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CBSE Class 10 Answered

Why are decomposition reactions called opposite of combination reactions?
Asked by turanjay02826.sarkar | 05 Dec, 2018, 12:05: AM
answered-by-expert Expert Answer

In a decomposition reaction, a single substance decomposes to form two or more substances.

This is the exact opposite of combination reaction in which two or more reactants combine to form a single product.

Therefore, decomposition reactions called the opposite of combination reactions.

For example:

CaO + CO2 →   CaCO3          ...... (Combination Reaction)

      CaCO3 →    CaO + CO2    ..... (Dcomposition Reaction)  

Answered by Varsha | 05 Dec, 2018, 11:07: AM

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