Answer :
(a) [tex]SO_3+H_2O\rightarrow H_2SO_4[/tex]
This reaction is a synthesis reaction.
(b) [tex]Pb(NO_3)_2+2NaI\rightarrow PbI_2+2NaNO_3[/tex]
This reaction is a double-displacement reaction.
(c) [tex]CaCO_3\rightarrow CaO+CO_2[/tex]
This reaction is a decomposition reaction.
(d) [tex]2ZnS+O_2\rightarrow 2ZnO+2S[/tex]
This reaction is a single displacement reaction.
Explanation :
Synthesis reaction : A chemical reaction where multiple substances or reactants combine to form a single product.
It is represented as,
[tex]X+Y\rightarrow XY[/tex]
Combustion reaction : A chemical reaction in which a hydrocarbon reaction with the oxygen to give product as carbon dioxide and water.
It is represented as,
[tex]CH_4+2O_2\rightarrow CO_2+2H_2O[/tex]
Single replacement reaction : A chemical reaction in which the more reactive element replace the less reactive element.
It is represented as,
[tex]A+BC\rightarrow AC+B[/tex]
In this reaction, A is more reactive element and B is less reactive element.
Double replacement reaction : It is a type of chemical reaction where a positive cation and a negative anion of two reactants exchange places to form two new products.
It is represented as,
[tex]XY+AB\rightarrow XB+AY[/tex]
(X and A are the cations, Y and B are the anions)
Decomposition reaction : A chemical reaction where single larger substance or reactant decompose to give two or more products.
It is represented as,
[tex]XY\rightarrow X+Y[/tex]
(a) [tex]SO_3+H_2O\rightarrow H_2SO_4[/tex]
This reaction is a synthesis reaction.
(b) [tex]Pb(NO_3)_2+2NaI\rightarrow PbI_2+2NaNO_3[/tex]
This reaction is a double-displacement reaction.
(c) [tex]CaCO_3\rightarrow CaO+CO_2[/tex]
This reaction is a decomposition reaction.
(d) [tex]2ZnS+O_2\rightarrow 2ZnO+2S[/tex]
This reaction is a single displacement reaction.
