All of the following are homogeneous mixtures except

• tomato soup
• sugar-water solution
• gasoline
• salt-water solution

Which of the following is a colloid?

• water
• milk
• soil
• concrete

A mixture that appears to be uniform while being stirred but which separates into different phases when agitation ceases is a

• solvent
• colloid
• suspension
• solute

Which mixture can be separated by filtration?

• mayonnaise
• muddy water
• shaving cream
• gelatin

What type of solute-solvent combination is carbon dioxide in air?

• gas-liquid
• liquid-gas
• liquid-liquid
• gas-gas

Which is an example of a solid-liquid solution?

• alcohol-water
• oxygen-nitrogen
• sugar-water
• copper-nickel

When the size of the particles in a solution and in a colloid are compared, the particle size in the solution is

• smaller
• larger
• the same
• could be smaller or larger

Which of the following solutions does not contain an electrolyte?

• potassium bromide-water solution
• sugar-water solution
• hydrochloric acid solution
• sodium chloride-water solution

To conduct electricity, a solution must contain

• nonpolar molecules
• polar molecules
• free ions
• free electrons

A substance that is not soluble in a polar solvent is most likely

• nonpolar
• ionic
• polar
• hydrogen bond