3. What processes are involved in distillation?
a. separation and evaporation
b. evaporation and condensation
c. centrifugation and condensation
d. filtration and evaporation
4. How do you separate into its different components the mixture of miscible liquids?
a. centrifugation
b. distillation
c. evaporation
d. rectification
5. When separating alcohol and water, which is boiled off and why?
a. alcohol, because it has a lower boiling point
b. alcohol, because it floats on top of water
c. water, because it has a higher boiling point
d. water, because it is the solvent
6. At what temperature should a mixture be heated in order to separate two miscible liquids
with boiling points at 50°C and 80°C?
a. just below 50°C
b. 50°C or a few degrees higher
7. Why is there a need for rectification of air?
c. 80°C or a few degrees lower
d.
just a bit higher than 80°C
a. so that specific gases can be for different purposes
b. so that gases become liquids
c. so that the air is cooled
d. so that air is heated
8. Why is distillation an effective way of separating alcohol and water?
a. because water and
alcohol have the same bolling point
b. because water and alcohol have different boiling points
c. because water and alcohol have the same color
d. because water and alcohol have the same solubility
9. Why do some people prefer drinking distilled water than tap water?
a. distilled water has gases removed from it
b. distilled water has additional nutrients
c. distilled water has a sweeter taste than tap water
d. distilled water has impurities removed from it
10. What do you call the liquid that evaporates, then condenses via a long tube into a collecting
vessel during distillation?
residue
d. distillate
A solute
b. solvent
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