Question

why is decomposition reaction called opposite of combination reaction????

Answer 1

hii friend here is your answer

ln combination reaction two or more substance are combined to form New substance while in the decomposition reaction one substance decomposed into two or more substance .hence,decomposition reaction are called opposite of combination reaction .

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Answer 2

Bcoz in decomposition reaction single complex substance break in 2or more simple substance with help of electricity,heat,light energy whereas in combination 2or more substance combine to form a single complex substance