Question

explain that combination reaction is opposite of de combination reaction

Answer 1

Combination reaction :- in which 2 or more elements combine to form single compound.
Ex :- 2H2 + O2 _ 2H2O

Decomposition reaction :- in which compound break down into 2 or more elements.
Ex :- 2H2O _ 2H2 + O2

Hope it helps you.
Mark as brainlist if you like the answer.

Answer 2

combination reaction is a reaction in which two elements or compounds just combine together to form compounds..
example:2H2+O2===>2H2O
decomposition reaction is opposite of combination reaction, as in this compounds break into simple elements or smaller compounds
example: 2H2O====>2H2O+O2