Liquids and Solutions Multiple Choice Test
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Click in the appropriate box for each question, then click "Done" at the bottom.
10 marks for each correct answer. Hints cost 5 marks each.



1. In a solution of 5% ethanol in water:
Ethanol is the solute     Water is the solvent   The free energy of solution is negative     
Hydrogen bonds are predominant     All of the above
2. If the heat of solution is positive:
A solution will not be made     The solvent-solvent and solute-solute bonds are stronger 
than the solvent-solute bonds       The solvent-solvent and solute-solute bonds are weaker 
than the solvent-solute bonds   A solution will definitely be made     None of the above

3. The saying "like dissolves like" means:

Molecules of similar sizes form solutions
Molecules of similar shape form solutions
Molecules having similar intermolecular forces form solutions
None of the above
All of the above
4. The fundamental reason for freezing point depression, boiling point elevation 
and osmotic pressure is:
The entropy of a solution is lower than that of the pure solvent
The vapor pressure of a solution is lower than that of the pure solvent
The free energy of vaporization of a solution is more negative than that of the pure solvent
Solvent molecules are held tightly in a solution by the solute molecules
None of the above

5. Which of the following statements is true?
The cryoscopic constant is a function of the identity of the solute
The value of the ebullioscopic constant depends on how much solute is present
The osmotic pressure is not a function of temperature
The magnitude of the freezing point depression and boiling point elevation are the same 
for a given solution
None of the above
6.  A 1 m solution of NaCl(aq) has a lower boiling point than 1 m Na2SO4(aq). Why?
1 m Na2SO4(aq) contains more ions than 1 m NaCl(aq)
The SO4-2 ion is larger than the Cl- ion
Na2SO4 has a larger molecular weight than NaCl
NaCl(l) has a lower boiling point than Na2SO4(l)
None of the above

7.  Water has a higher boiling point than helium because:
Water has a higher molecular weight than helium
Water hydrogen bonds with itself and helium does not
Water has larger dispersion forces than does helium
Helium is always a gas - it does not have a boiling point   
None of the above


8. Liquid water will rise up a narrow capillary tube because: 
Water and glass are made of the same molecules
The water is trying to escape from the caillary
There are strong attractive forces between the glass and the water
Glass is electrostatically charged

9. Boiling point is a function of the existing atmospheric pressure because:
Higher pressure usually means warmer weather
Lower pressure allows "easier" evaporation of the liquid
Higher pressure causes more air to dissolve in the liquid
None of the above

10. Raoult's law states:
If you murder someone, you will go to jail
The vapor pressure above a solution is higher than that of the pure solvent
The vapor pressure above a solution is proportional to the mole fraction of the involatile solute
The vapor pressure above a solution is proportional to the vapor pressure of the pure involatile solute
The vapor pressure above a solution is proportional to the mole fraction of the solvent