Question

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

Answer 1

Answer:

Decomposition reaction are called opposite of combination reactions because in decomposition reactions a single substance breakdown into 2 or more products. But in combination reactions 2 or more reactants combine to form a single product.

Example -- C + O2 gives CO2 (COMBINATION)

2H2O upon heating gives H2 +O2