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FREEZING POINT OF THE SOLVENT MCQs

Total Questions : 20 | Page 2 of 2 pages
Question 11. What is the freezing point of an aqueous 1
  1.    -1.86 oC
  2.    +1.86 oC
  3.    -3.72 oC
  4.    -0.93 oC
 Discuss Question
Answer: Option C. -> -3.72 oC
Question 12. A 17
  1.    353 g/mol
  2.    231 g/mol
  3.    285 g/mol
  4.    185 g/mol
 Discuss Question
Answer: Option D. -> 185 g/mol
Question 13. The freezing point of a solution is ___________ that of a pure solvent
  1.    more than
  2.    less than
  3.    equal to
  4.    All of the above
 Discuss Question
Answer: Option B. -> less than
Question 14. What is the freezing point of an antifreeze solution created by adding 651 g of ethylene glycol (CH2(OH)CH2(OH)) to 2505 g of water? Kf = 1
  1.    0 oC
  2.    2.2 oC
  3.    -4.19 oC
  4.    -7.79 oC
 Discuss Question
Answer: Option D. -> -7.79 oC
Question 15. Calculate the freezing point of a solution made from 72
  1.    -6.500C
  2.    -9.550C
  3.    -12.200C
  4.    -24.810C
 Discuss Question
Answer: Option C. -> -12.200C
Question 16. In comparison to a 0
  1.    the same
  2.    about twice
  3.    about three times
  4.    about six times
 Discuss Question
Answer: Option C. -> about three times
Question 17. Which colligative property measurement is best to use for compounds with a molar mass greater than 5000 g/mol?
  1.    osmotic pressure
  2.    freezing point depression
  3.    boiling point elevation
  4.    vapor pressure lowering
 Discuss Question
Answer: Option A. -> osmotic pressure
Question 18. For a liquid solvent, adding solute particles will __________ the freezing temperature
  1.    increase
  2.    decrease
  3.    not affect
  4.    All of above
 Discuss Question
Answer: Option B. -> decrease
Question 19. Changes in boiling and freezing points of ionic solutions are based on
  1.    only the molarity
  2.    only the molality
  3.    the number of total particles dissolved in the solvent
  4.    none of the above
 Discuss Question
Answer: Option C. -> the number of total particles dissolved in the solvent
Question 20. 0
  1.    178.9
  2.    177.8
  3.    176.7
  4.    175.6
 Discuss Question
Answer: Option A. -> 178.9

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