Question

Why ase decomposition reactions called the opposite
of Combination reactions? write
equation for decomposition reactions.
​

Answer 1

Explanation:

I hope this will be helpful

plz follow me

Answer 2

Combination reaction is said to be the reaction between two or more molecules to form a larger molecule; whereas the decomposition reaction is defined as the splitting of larger molecules into two or more smaller molecules. This essentially explains that the decomposition reaction is the opposite of the combination reaction.

In most of the cases the decomposition reaction is endothermic since heat from the surrounding or induced heat is used to break the bonds of the larger molecule.

Few examples of decomposition reactions are:

ZnCO3 → ZnO + CO2

ZnCO3 → ZnO + CO2CaCO3 + Energy → CaO + CO2

ZnCO3 → ZnO + CO2CaCO3 + Energy → CaO + CO22HgO → 2Hg + O2