Answer: [tex]Pb(NO_3)_2(aq)+2HCl(aq)\rightarrow 2HNO_3(aq)+PbCl_2(s)[/tex]
Explanation: 1. [tex]Ca(OH)_2(s)\rightarrow CaO(s)+H_2O(g)[/tex]
This is an example of decomposition reaction in which one reactant gives two or more than two products on absorption of energy.
2. [tex]C_2H_5OH(I)+O_2(g)\rightarrow CO_2(g)+H_2O(g)[/tex]
This is an example of combustion reaction in which hydrocarbon burns in the presence of oxygen to form carbon dioxide, water and energy.
3. [tex]Zn(s)+2HCl(aq)\rightarrow ZnCl_2(aq)+H_2(g)[/tex]
This is an example of single replacement reaction in which a more reactive element displaces a less reactive element from its salt solution.
4. [tex]Pb(NO_3)_2(aq)+2HCl(aq)\rightarrow 2HNO_3(aq)+PbCl_2(s)[/tex]
This is an example of a double displacement reaction in which exchange of ions take place.
