Question

A ___ reaction occurs when the reactant(s) combine with oxygen, releasing light and heat.

1) decomposition
2) acid-base
3) combustion
4) displacement

Answer 1

A combustion reaction is the correct answer, where reactants combine with oxygen to release light and heat. These reactions are integral in processes like burning fuels and are characterized by the formation of oxides.

Step-by-step explanation:

A combustion reaction occurs when the reactant(s) combine with oxygen, releasing light and heat.

Examples of combustion reactions include the burning of hydrogen gas, where 2H₂ (g) + O₂ (g) → 2H₂O(g), releasing energy in the form of heat and light. The general equation for a combustion reaction is fuel + O₂ → CO₂ + H₂O + Heat when a hydrocarbon is a fuel. Combustion reactions require oxygen as one reactant and typically produce oxides as the products.