Question

Plz give 10 examples of decomposition reaction .
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Answer 1

The electrolysis of water results the formation of oxygen and hydrogen gas involves the decomposition;

2 H2O → 2 H2 + O2

Similarly the decomposition of solid potassium chloride results the formation of solid potassium with gaseous chlorine molecule.  

The chemical reaction can be written as given below;

2 KCl(s) → 2 K(s) + Cl2(g)

the decomposition of CaCO3 results the formation of CaO (calcium oxide) and CO2 (carbon dioxide) at high temperature.  

The reaction can be written as given below;

CaCO3(s) --> CaO(s) + CO2(g)

Similarly the decomposition of potassium chlorate (KClO3) at high temperature results the formation of solid potassium chloride and oxygen gas. Same reaction is used for the preparation of oxygen gas.

2KClO3(s) --> 2KCl (s) + 3O2(g)the thermal decomposition of hydrated oxalic acid removes the water content from molecule to form anhydrous oxalic acid.

(COOH)2. 2H2O --> (COOH)2 + 2H2O

Another type of decomposition is electrolytic decomposition which is also known as electrolysis.  

This reaction takes place in presence of electric current in the aqueous solution of the sample. The electrolysis of water is the best example of electrolysis.  

The decomposition takes place by passing electric current through it. The reaction can be written as given below;

2H2O (l) --> 2H2(g) + O2(g)

Answer 2

Hello Friend.

Here is your answer below,,

CaCO3 = CaO + CO2

2H2O2 = 2H2O + O2

H2CO3 = H2O + CO2

2KClO3 = 2KCl + O3

2H2O = 2H2 + O2

2HgO = 2Hg + O2

2Ag2O = 4Ag + O2

H2SO4 = H2O + SO3

NH4OH = H2O + NH3

2NH3 = N2 + 3H2

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