Question

What is a decomposition reaction ? give two examples of decomposition taking place due to heat, light and electricity

Answer 1

It is a reaction in which a substance breaks down into 2 or more products .
Eg Due to electricity - Electrolysis of water 
      Heat-Decompsition of ferrous sulphate crystals into ferric oxide , sulphur        dioxide and sulphur trioxide .
Due to light- decomposition of silver chloride into silver and chlorine .

Answer 2

(1.) Decomposition on heating

(1.) Decomposition on heating Calcium carbonate when heated gives quicklime (CaO) and carbon dioxide

(1.) Decomposition on heating Calcium carbonate when heated gives quicklime (CaO) and carbon dioxide $CaCO _{3 } →CaO + CO _{2}$

(1.) Decomposition on heating Calcium carbonate when heated gives quicklime (CaO) and carbon dioxide $CaCO _{3 } →CaO + CO _{2}$(2.) Decomposition by light

(1.) Decomposition on heating Calcium carbonate when heated gives quicklime (CaO) and carbon dioxide $CaCO _{3 } →CaO + CO _{2}$(2.) Decomposition by light Silver chloride decomposes to silver and chlorine in presence of sunlight

(1.) Decomposition on heating Calcium carbonate when heated gives quicklime (CaO) and carbon dioxide $CaCO _{3 } →CaO + CO _{2}$(2.) Decomposition by light Silver chloride decomposes to silver and chlorine in presence of sunlight

(1.) Decomposition on heating Calcium carbonate when heated gives quicklime (CaO) and carbon dioxide $CaCO _{3 } →CaO + CO _{2}$(2.) Decomposition by light Silver chloride decomposes to silver and chlorine in presence of sunlight $2AgCl→2Ag+Cl _{2}$

(1.) Decomposition on heating Calcium carbonate when heated gives quicklime (CaO) and carbon dioxide $CaCO _{3 } →CaO + CO _{2}$(2.) Decomposition by light Silver chloride decomposes to silver and chlorine in presence of sunlight $2AgCl→2Ag+Cl _{2}$(3). Decomposition by electricity

(1.) Decomposition on heating Calcium carbonate when heated gives quicklime (CaO) and carbon dioxide $CaCO _{3 } →CaO + CO _{2}$(2.) Decomposition by light Silver chloride decomposes to silver and chlorine in presence of sunlight $2AgCl→2Ag+Cl _{2}$(3). Decomposition by electricity Water on electrolysis gives hydrogen and oxygen

(1.) Decomposition on heating Calcium carbonate when heated gives quicklime (CaO) and carbon dioxide $CaCO _{3 } →CaO + CO _{2}$(2.) Decomposition by light Silver chloride decomposes to silver and chlorine in presence of sunlight $2AgCl→2Ag+Cl _{2}$(3). Decomposition by electricity Water on electrolysis gives hydrogen and oxygen

(1.) Decomposition on heating Calcium carbonate when heated gives quicklime (CaO) and carbon dioxide $CaCO _{3 } →CaO + CO _{2}$(2.) Decomposition by light Silver chloride decomposes to silver and chlorine in presence of sunlight $2AgCl→2Ag+Cl _{2}$(3). Decomposition by electricity Water on electrolysis gives hydrogen and oxygen $2H_{2}</strong></p><p><strong>(1.) Decomposition on heating Calcium carbonate when heated gives quicklime (CaO) and carbon dioxide [tex]CaCO _{3 } →CaO + CO _{2}$(2.) Decomposition by light Silver chloride decomposes to silver and chlorine in presence of sunlight $2AgCl→2Ag+Cl _{2}$(3). Decomposition by electricity Water on electrolysis gives hydrogen and oxygen $2H_{2}O→2H_{2} +O _{2}$