CHEM5 QUIZ

What is a solution?

• A chemical element

• A heterogeneous mixture

• A uniform mixture of two or more substances

• A pure substance

Which of the following mixtures is a solution?

• Oil and water

• Sand and iron filings

• Salt dissolved in water

• Smoke in air

What type of solution is formed when carbon dioxide is dissolved in soda?

• Solid in gas

• Gas in gas

• Gas in liquid

• Liquid in solid

What happens to the solubility of most solid solutes in water as temperature increases?

• It remains the same

• It increases

• It decreases

• It becomes zero

When a solution contains less solute than it can hold at a given temperature, it is called:

• Saturated

• Concentrated

• Unsaturated

• Supersaturated

London dispersion forces occur in:

• Only polar molecules

• Only hydrogen-bonded molecules

• All molecules, polar and nonpolar

• Ionic compounds only

Which statement best describes hydrogen bonding?

• A bond between two hydrogen atoms

• An attraction between hydrogen and carbon atoms

• A strong dipole-dipole force involving hydrogen and N, O, or F

Which of these molecules can form all three types of intermolecular forces (london dispersion, dipole-dipole, and hydrogen bonding)?

• CH₄

• H₂O

• CO₂

• CF₄

Which of the following substances is a base?

• HCl

• H₂SO₄

• NaOH

• CH₃COOH

Which of the following is a strong acid?

• CH₃COOH

• H₂CO₃

• NH₄⁺

• HCl