Choose the letter of the best answer.

1. Which of the following statement best describe colloids?
a. sticky, creamy substance
b. clear, pure substance
c. cloudy, floats and settles at the bottom
d. clear, one phase is seen

2. Which is true about colloids?
a. Colloids have molecules that are big enough to settle at the bottom.
b. Colloids are formed by mixing different kinds of solution.
c. Colloids are mixtures of two or more substances that can easily be seen by the naked eye.
d. Colloids composed of dispersed medium bigger than a solution but smaller
than a suspension.

3. A beam of light that form a straight path through the mixture shows that a mixture is a colloid. What do you call this scattering of light?
a. Brownian motion c. Tyndall effect
b. dispersing medium d. dispersed material

4. Which of the following are examples of colloids?
a. gelatin, smoke, water and sugar, mixed nuts
b. jam, honey, fruit salad, carbonated drinks,
c. fog, mayonnaise, butter, glue
d. jelly, soap suds, amalgam, rubbing alcohol

5. What kind of colloid is a mayonnaise?
a. sol b. emulsion c. foam d. aerosol