Question

Why are decomposition reactions called the opposite of combination reactions?Write equations for these reactions.​

Answer 1

Answer:

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Answer 2

Answer: In decomposition reaction , one reactent decomposes to give out more then one product and on the other hand, in combination reaction more then one reactent combines to give out one product.

Explanation: In decomposition reaction , one reactent decomposes to give out more then one product and on the other hand, in combination reaction more then one reactent combines to give out one product.

Example: Decomposition reaction :    

•     2H2O(l)+ heat    ---------->    2H2(g)+ O2(g)

               Combination reaction:

•     2Mg(s)+ O2(g)  ------------>  2MgO(s)