Question

Give one example each of

(1) Thermal decomposition

(2) Electrolytic decomposition

(3) Photodecomposition

Answer 1

1) thermal decomposition: CaCO3 heat = CaO +CO2.


2) electrolytic decomposition: 2h2o electrolysis = 2H2 + O2.

3) photo decomposition: AgCl sunlight = Ag +Cl2.

Answer 2

Answer:

Decomposition is defined as the chemical reaction in which a single compound gives two or more simple substances. It requires energy to break the bonds between reactants, thus is an endothermic process.

$A\rightarrow B+C$

Thermal decomposition: decomposition using heat

$MgCO_3\rightarrow MgO+CO_2$

Electrolytic decomposition: decomposition using electricity

$2H_2O\rightarrow 2H_2+O_2$

Photo decomposition: decomposition using light

$2AgCl\rightarrow 2Ag+Cl_2$