N which two types of reactions do opposite chemical changes occur? double replacement and combustion single replacement and double replacement synthesis and decomposition combustion and synthesis

Answer: synthesis and decompositionExplanation:1. Double displacement reaction is one in which exchange of ions take place. Example: \(2NaOH(aq)+(NH_4)_2SO_4(aq)\rightarrow 2NH_4OH(aq)+Na_2SO_4(aq)\)2. Combustion is a type of chemical reaction in which fuel is reacted with oxygen to form carbon dioxide and water. Example:  \(C_6H_{}12{}O_6+O_2 \rightarrow CO_2+H_2O\)3. Single replacement reaction is a chemical reaction in which more reactive element displaces the less reactive element from its salt solution. Example: \(Zn+2HCl\rightarrow ZnCl_2+H_2\)4. Synthesis reaction is a chemical reaction in which two reactants are combining to form one product. Example: \(Li_2O+CO_2\rightarrow Li_2CO_3\) 5. Decomposition is a type of chemical reaction in which one reactant gives two or more than two products. Example: \(Li_2CO_3\rightarrow Li_2O+CO_2\)Thus synthesis ad decomposition are opposite chemical changes.