what is a decomposition reaction? give 2 examples each of decomposition taking place due to heat , light and electricity.
Answers
Decomposition reaction is a type of reaction in which, a chemical compound is broken to give two new elements or compounds or both.
Reaction brought about by heat:
CaCO3 ---) CaO + CO2
Reaction brought about by light:
HCl ----) H+ + Cl-
A decomposition reaction is a type of chemical reaction in which a single compound breaks down into 2 or more elements or new compounds.
Examples-due to heat
1) calcium carbonate decomposes in calcium oxide & carbon dioxide when heated.
2)When heated strongly potassium chlorate decomposes into potassium chlorite and oxygen.
Examples - Due to light
silver chloride decomposes into silver and chlorine .
hydrogen peroxide decomposes into water and oxygen.
ex- due to electricity.
water decomposes into hydrogen and oxygen.
sodium chloride decomposes into sodium and chlorine.