What is decomposition reaction? List its types and discuss each by giving examples. (3 marks)
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Decomposition:-Those reactions in which a single reactant brokes down into two or more simpler products are known as decomposition reactions.
They are of 3 types
1)Electrolytic decomposition:-
when decomposition carries out with the help of electricity,then it is known as electrolytic decomposition.For e.g. 2H2O------>2H2+O2
2)Thermal decomposition:-
when decomposition process carries out with the help of heat it is known as thermal decomposition.For e.g. CaCO3-----heat--> CaO+CO2
3)Photochemical decomposition:-
when decomposition process carries out with the help of sunlight it is known as photochemical decomposition.For eg 2AgBr-----sunlight------> 2Ag+Br2
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They are of 3 types
1)Electrolytic decomposition:-
when decomposition carries out with the help of electricity,then it is known as electrolytic decomposition.For e.g. 2H2O------>2H2+O2
2)Thermal decomposition:-
when decomposition process carries out with the help of heat it is known as thermal decomposition.For e.g. CaCO3-----heat--> CaO+CO2
3)Photochemical decomposition:-
when decomposition process carries out with the help of sunlight it is known as photochemical decomposition.For eg 2AgBr-----sunlight------> 2Ag+Br2
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