1. Which solution has the highest boiling point?
1) 1.0 M KNO3
2) 2.0 M KNO3
3) 1.0 M Ca(NO3)2
4) 2.0 M Ca(NO3)2
2. A 1 molal solution of MgCl2 has a higher boiling point
than a 1 molal solution of
1) FeCl3
2) CaCl2
3) BaCl2
4) NaCl
3. Which concentration of a sugar solution has a boiling
point of 100.52°C at standard pressure?
1) 1.0 molal
3) 3.0 molal
2) 2.0 molal
4) 4.0 molal
4. Which expression defines the molality (m) of a solution?
1) grams of solute
kg of solution
2) moles of solute
kg of solution
3) grams of solute
kg of solvent
4) moles of solute
kg of solvent
5. What occurs as a salt dissolves in water?
1) The number of ions in the solution decreases, and
the freezing point decreases.
2) The number of ions in the solution decreases, and
the freezing point increases.
3) The number of ions in the solution increases, and the
freezing point decreases.
4) The number of ions in the solution increases, and the
freezing point increases.
6. Which concentration of a solution of CH3OH in water
has the lowest freezing point?
1) 0.1 M
3) 0.001 M
2) 0.01 M
4) 0.0001 M
7. A 0.100-molal aqueous solution of which compound has
the lowest freezing point?
1) C6H12O6
2) CH3OH
3) C12H22O11
4) NaOH
8. Which solute, when added to 1,000 grams of water, will
produce a solution with the highest boiling point?
1) 29 g of NaCl
2) 58 g of NaCl
3) 31 g of C2H6O2
4) 62 g of C2H6O2
9. When 2.00 moles of sugar (C6H12O6) are dissolved in
1,000. grams of water, the boiling point of the resulting
solution is closest to
1) 99.0°C
3) 100.°C
2) 99.5°C
4) 101°C
10. Which aqueous solution has the lowest freezing point?
1) 1.0 M C6H12O6
2) 1.0 M C2H5OH
3) 1.0 M CH3COOH
4) 1.0 M NaCl
11. What is the freezing point of a solution that contains 1.00
mole of a nonelectrolyte dissolved in 1,000. grams of
water?
1) 0.00ºC
3) –1.86ºC
2) 0.520ºC
4) –3.72ºC
12. Which of the following solutions, each containing a
nonvolatile solute, will boil at the highest temperature?
1) 1 mole of electrolyte dissolved in 1000 g of H2O
2) 2 moles of electrolyte dissolved in 1000 g of H2O
3) 1 mole of nonelectrolyte dissolved in 1000 g of H2O
4) 2 moles of nonelectrolyte dissolved in 1000 g of H2O
13. As a solute is added to a solvent, what happens to the
freezing point and the boiling point of the solution?
1) The freezing point decreases and the boiling point
decreases.
2) The freezing point decreases and the boiling point
increases.
3) The freezing point increases and the boiling point
decreases.
4) The freezing point increases and the boiling point
increases.
14. A student dissolves 1.0 mole of sucrose (C12H22O11) in
1,000. grams of water at 1.0 atmosphere. Compared to
the boiling point of pure water, the boiling point of the
resulting solution is
1) 0.52 C° lower
3) 0.52 C° higher
2) 1.86 C° lower
4) 1.86 C° higher
15. Of the following solutions, the one that will boil at the
highest temperature contains 1 mole of nonvolatile solute
dissolved in
1) 250 g of solvent
3) 750 g of solvent
2) 500 g of solvent
4) 1,000 g of solvent
16. Compared to pure water, an aqueous solution of calcium
chloride has a
1) higher boiling point and higher freezing point
2) higher boiling point and lower freezing point
3) lower boiling point and higher freezing point
4) lower boiling point and lower freezing point
17. A 2.0-molal sugar solution has approximately the same
freezing point as a 1.0-molal solution of
1) CaCl2
2) CH3COOH
3) C2H5OH
4) NaCl
18. A 1 kilogram sample of water will have the highest
freezing point when it contains
1) 1 × 1017 dissolved particles
2) 1 × 1019 dissolved particles
3) 1 × 1021 dissolved particles
4) 1 × 1023 dissolved particles
19. Which solution containing 1 mole of solute dissolved in
1000 grams of water has the lowest freezing point?
1) KOH(aq)
2) C2H12O6(aq)
3) C2H5OH(aq)
4) C12H22O11(aq)
20. At standard pressure when NaCl is added to water, the
solution will have a
1) higher freezing point and a lower boiling point than
water
2) higher freezing point and a higher boiling point than
water
3) lower freezing point and a higher boiling point than
water
4) lower freezing point and a lower boiling point than
water
21. The freezing point of a 1.00-molal solution of
C2H4(OH)2 is closest to
1) +1.86ºC
3) –3.72ºC
2) –1.86ºC
4) +3.72ºC
22. A 1.00 molal solution of sugar will freeze at
1) –0.52ºC
3) 0.52ºC
2) –1.86ºC
4) 1.86ºC
23. Which 1-molal aqueous solution has the lowest freezing
point?
1)
3)
2)
4)
24. What occurs when NaCl(s) is added to water?
1) The boiling point of the solution increases, and the
freezing point of the solution decreases.
2) The boiling point of the solution increases, and the
freezing point of the solution increases.
3) The boiling point of the solution decreases, and the
freezing point of the solution decreases.
4) The boiling point of the solution decreases, and the
freezing point of the solution increases.
25. Which ratio of solute-to-solvent could be used to prepare
a solution with the highest boiling point?
1) 1 g of NaCl dissolved per 100 g of water
2) 1 g of NaCl dissolved per 1000 g of water
3) 1 g of C12H22O11 dissolved per 100 g of water
4) 1 g of C12H22O11 dissolved per 1000 g of water
26. Which solution will freeze at the lowest temperature?
1) 1 mole of sugar in 500 g of water
2) 1 mole of sugar in 1,000 g of water
3) 2 moles of sugar in 500 g of water
4) 2 moles of sugar in 1,000 g of water
27. When ethylene glycol (an antifreeze) is added to water,
the boiling point of the water
1) decreases, and the freezing point decreases
2) decreases, and the freezing point increases
3) increases, and the freezing point decreases
4) increases, and the freezing point increases
Answer Key
1.
4
2.
4
3.
1
4.
4
5.
3
6.
1
7.
4
8.
2
9.
4
10.
4
11.
3
12.
2
13.
2
14.
3
15.
1
16.
2
17.
4
18.
1
19.
1
20.
3
21.
2
22.
2
23.
2
24.
1
25.
1
26.
3
27.
3