Chemical Reactions Quiz

2 elements or molecules combine to form 1 molecule.

• a. combination reaction

• b. decomposition reaction

1 molecule is broken down into 2 separate elements or molecules.

• a. combination reaction

• b. decomposition reaction

One element or molecule replaces another element in a molecule.

• a. single replacement reaction

• b. double replacement reaction

Elements in molecules replace each other.

• a. single replacement reaction

• b. double replacement reaction

A reaction of a compound containing carbon and hydrogen with oxygen gas; releases carbon dioxide gas and water vapor.

• a. combustion reaction

• b. oxidation/reduction (redox) reaction

• c. neutralization

A transfer of electrons that changes the oxidation number (charge) of the atom from the reactant to the product side.

• a. combustion reaction

• b. oxidation/reduction (redox) reaction

• c. neutralization

An acid and a base react to form water and salt with a pH level of 7.

• a. combustion reaction

• b. oxidation/reduction (redox) reaction

• c. neutralization

A + B → AB

• a. combination reaction

• b. decomposition reaction

C + O₂ → CO₂

• a. combination reaction

• b. decomposition reaction

AB → A + B

• a. combination reaction

• b. decomposition reaction