Answer: a) [tex]Ba(ClO_3)_2\rightarrow BaCl_2+3O_2[/tex]: Decomposition
b) [tex]NaNO_2+HCl\rightarrow NaCl+HNO_2[/tex]: double displacement
c) [tex]CaO+CO_2\rightarrow CaCO_3[/tex]: Synthesis (Combination)
d) [tex]ZnSO_4+Mg\rightarrow MgSO_4+Zn[/tex]: redox
Explanation:
Decomposition is a type of chemical reaction in which one reactant gives two or more than two products.
[tex]Ba(ClO_3)_2\rightarrow BaCl_2+3O_2[/tex]
A double displacement reaction is one in which exchange of ions take place.
[tex]NaNO_2+HCl\rightarrow NaCl+HNO_2[/tex]
Synthesis reaction is a chemical reaction in which two reactants are combining to form one product.
[tex]CaO+CO_2\rightarrow CaCO_3[/tex]
Redox reaction is a type of chemical reaction in which oxidation and reduction takes place in one single reaction. The oxidation number of one element increases and the oxidation number of other element decreases.
[tex]ZnSO_4+Mg\rightarrow MgSO_4+Zn[/tex]