The light gray spheres are chlorine atoms, the blue spheres are nitrogen atoms, the orange spheres are oxygen atoms, and the molecules involved are gases in the reaction represented below. Determine the type of chemical reaction.

Identify the type of reaction that occurs when copper displaces silver in Ag(NO₃)₂.

Identify the type of the following unbalanced equation: Zn (s) + O₂ (g) → ZnO (s)

The compound potassium chlorate (KClO₃) decomposes into potassium chloride (KCl) and oxygen gas (O₂). Provide the balanced reaction equation.

Octane (C₈H₁₈) is added to fuels in order to improve the performance of engines. Give the balanced equation for the combustion of octane with O₂ which yields CO₂ and H₂O.

Identify which among the chemical equations is an acid-base reaction.