Question

Identify the reaction type for each generic chemical equation.

A + B → AB:

AB → A + B:

Hydrocarbon + O2 → CO2 + H2O:

AB + CD → AD + CB:

Answer 1

A + B → AB: Synthesis (combination) reaction — two reactants combine to form one product.

AB → A + B: Decomposition reaction — one reactant breaks into two or more products.

Hydrocarbon + O2 → CO2 + H2O: Combustion reaction — hydrocarbon oxidizes (complete combustion gives CO2 and H2O).

AB + CD → AD + CB: Double displacement (double replacement, metathesis) reaction — ions/parts exchange between compounds.