Chemical Reactions Quiz

What is a chemical change or chemical reaction?

• A process in which one or more pure substances are converted into one or more different pure substances

• A process in which substances change state

• A process in which substances change temperature

• A process in which substances change color

What are the relative numbers of particles of each reactant and product indicated by in a chemical equation?

• Coefficients

• Exponents

• Subscripts

• Superscripts

What is the solvent in an aqueous sodium chloride solution?

• Chlorine

• Water

• Sodium Chloride

• Hydrogen Chloride

What type of reactions do precipitation reactions belong to?

• Double-displacement reactions

• Combustion reactions

• Acid-base reactions

• Oxidation-reduction reactions

What is the role of water molecules in the process of dissolving an ionic compound?

• Create new chemical bonds

• Increase the temperature of the solution

• Shield the ions from the attractions exerted by the solid

• Break the ionic bond

What is the solute in a mixture that is 5% liquid pentane and 95% liquid hexane?

• Carbon

• Hydrogen

• Hexane

• Pentane

What is the major component in a solution of gases in liquids?

• Compound

• Mixture

• Solute

• Solvent

What is the process through which an ionic compound dissolves in water?

• Solubility

• Dissociation

• Ionization

• Precipitation

What is a chemical reaction?

• A process where substances evaporate

• A process where substances remain the same

• A process where substances change into different substances

• A process where substances freeze

What do coefficients in a chemical equation represent?

• The speed of the reaction

• The temperature of the reaction

• The state of matter of the substances

• The numbers in front of chemical formulas