Question

write the type of decomposition reaction with suitable example

Answer 1

Decomposition reactions are chemical reactions in which a more complex molecule breaks down to make simpler ones. There are three types of decomposition reactions:

Thermal decomposition reactions;
Elctrolytic decomposition reactions;
Photo decomposition reactions.

Thermal decomposition - such reactions are usually endothermic, since energy in the form of heat is required to break the bonds of the more complex molecule. Examples include

CaCO3(s)+heat→CaO(s)+CO2(g) - calcium carbonate decomposes into calcium oxide and carbon dioxide when heated;

2KClO3(s)+heat→2KCl(s)+3O2(g) - potassium chlorate decomposes into potassium chloride and oxygen gas when ehated;

2Fe(OH)3+heat→Fe2O3+3H2O -ferric dioxide decomposes into ferric oxide and water when heated;

Electrolytic decomposition - such reactions occur when an electric current is passed through an aqueous solution of a compound. Two classic examples are the electrolysis of water

H2O(l)→2H2(g)+O2(g) - water decomposes into hydrogen and oxygen in the presence of an electric current


NaCl(l)→2Na(l)+Cl2(g) - molten sodium chloride will decompose into molten sodium and chlorine gas;

Photo decomposition - these reactions occur in the presence of light (photons). Examples include

2AgCl(s)+sunlight→2Ag(s)+Cl2(g) - silver chloride decomposes into silver and chlorine in the presence of sunlight;

2AgBr(s)+sunlight→2Ag(s)+2Cl2(g) - silver bromide decomposes into silver and chlorine in the presence of sunlight;

hope it helps u friend

Answer 2

Heya,
Friend,

●DECOMPOSITION REACTION....

The reaction In which one compound splits up into two or more simpler simpler substances ( elements or compounds) , are called decomposition reaction.

●Decomposition reaction is of three types....

● THERMAL DECOMPOSITION REACTION :
These are the reactions in which a compound brakes into two or more simpler substances on heating.

Ex,
2KCIO3 (s) ➡ 2KCI(s)+3O2(g)

● ELECTROLYTIC DECOMPOSITION REACTION :
The reactions in which a compound in aqueous solution or in the molten state is decomposed on passing electricity are called electrolytic decomposition reaction.

Ex,
2H2O (l) ➡ 2H2 (g) + O2(g)

●PHOTOCHEMICAL DECOMPOSITION REACTION :
When a compound is decomposed by light, it is called Photochemical decomposition reaction or photolysis.

Ex,

H2O2 ( l ) ➡ H2 ( g) + O2 (g) .

Hope this will help you...!