Question

why are decomposition reactions called the opposite of combination reactions? write equation for these reaction.

Answer 1

these are those reactions in which the element or compound decomposes to form two products but in combination reaction the reactants are combined to form a new single product. Thus it is opposite of combination reaction.
eg. -
H2O ---> H2 +O2
CaCo3 --->CaO + Co2

Answer 2

Heya here is ur answer dear....

Decomposition reaction is the splitting of a compound into two or more simple products but combination reaction is the reaction where two or more substances are combine to form a single product ... so this reason the decomposition reaction called the opposite of combination reaction........
Eg for decomposition reaction::--- 2FeSo4 That gives Fe2 + SO2 + So3 .......
Combination reaction::::----2Mg + O2 that give 2MgO..........
Hope it helps you dear......


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