Question

why are decomposition reaction called the opposite of combination reaction ? write equation for this reaction

Answer 1

decomposition reaction is called opposite of combination reaction because in decomposition reaction a single reactant breaks down to form two or more product while in combination reaction two or reactant combine to form a single product.

equation of combination reaction:-

C+O2= CO2

equation for decomposition reaction :-

CaCO3=CaO +CO2

Answer 2

HOLA

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In a combination reaction , two or more molecules combine to form a single product , Also a large amount of heat is evolved

The decomposition reaction require energy either in the form of heat , light or electricity for the breaking down of one substance into two more substance

C + O2 ---> Co2
( Combination )

2NH3 + Heat --> N2 + 3H2
( Decomposition)

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