Chemical Reactions Review Quiz

What is a chemical reaction?

• The process of forming new chemical bonds in the products

• The process of transforming one set of chemical substances into a brand new substance

• The process of releasing energy in the form of light or sound

• The process of breaking chemical bonds in the reactants

What are the reactants (left side of the arrow) in the chemical reaction involving coal and oxygen?

• Carbon and oxygen

• Coal and carbon dioxide

• Carbon dioxide and oxygen

• Coal and oxygen

What are the products (right side of the arrow) in the chemical reaction involving coal and oxygen?

• Carbon and oxygen

• Coal and carbon dioxide

• Coal and oxygen

• Carbon dioxide

What is the purpose of a chemical equation?

• To describe the physical state of reactants and products

• To show the coefficients of reactants and products

• To explain the energy changes in a chemical reaction

• To represent the reactants and products using chemical symbols and numbers

What happens to energy in a chemical reaction?

• Energy is released into the surroundings

• Energy is absorbed from the surroundings

• Energy is constantly being reused

• Energy is created and destroyed

What is an endothermic reaction?

• A reaction where energy is absorbed and the temperature of the surroundings increases

• A reaction where energy is released and the temperature of the surroundings decreases

• A reaction where energy is absorbed and the temperature of the surroundings decreases

• A reaction where energy is released and the temperature of the surroundings increases