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Multiple Choice Quiz
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1

Why does solid water (ice) float in liquid water?
A)Because it is completely hydrogen bonded and packs in such a way that makes it less dense than liquid water.
B)Because the solid state of a substance normally floats in its liquid state.
C)Because it is more dense than liquid water.
D)Because it freezes at 100o C.
2

When water freezes
A)heat is absorbed.
B)heat is released.
C)heat is neither absorbed nor released.
D)it becomes more dense than it is in its liquid state.
3

If you add heat to a mixture of ice and water, the temperature will
A)rise immediately.
B)rise until the ice is all melted and then will remain constant.
C)decrease until all the ice is melted and then increase.
D)not rise until all the ice is melted.
4

Water boils at a lower temperature on Pike's Peak than it does at sea level because
A)the atmospheric pressure is lower on Pike’s Peak than it is at sea level.
B)the atmospheric pressure is higher on Pike’s Peak than it is at sea level.
C)the heat source is not as hot at higher altitudes.
D)the heat source is hotter at higher altitudes, so water boils at lower temperatures.
5

Boiling water in a pressure cooker
A)requires less heat than boiling the same amount of water in an open kettle.
B)raises the temperature at which the water boils.
C)lowers the temperature at which the water boils.
D)requires less heat than boiling the same amount of water at a much higher altitude.
6

The specific heat of a substance
A)is the heat capacity of the substance.
B)has a value of 4.184 J/gK.
C)is the amount of heat needed to raise the temperature of the substance 1o C.
D)is the amount of heat needed to raise the temperature of 1 gram of the substance 1o C.
7

When water evaporates off of an object, the object is
A)cooler.
B)warmer.
C)experiences no temperature change.
D)becomes heavier.
8

Which of the following gives off more heat when cooling to room temperature?
A)a 5 gram metal bar at 600o C
B)a bath tub with 50L of water at 50o C
C)a 2L pot of coffee at 85o C
D)a boiling kettle of 1L of chicken broth
9

The specific heat of copper is 0.38J/gK. What is the heat capacity of 200 grams of copper?
A)760J/K
B)76J/K
C)0.76kJ/K
D)7.6kJ/K
10

What does the phrase "like dissolves like" refer to?
A)a nonpolar solvent dissolving a polar solute
B)a nonpolar solvent dissolving a nonpolar solute
C)a polar solvent dissolving a nonpolar solute
D)a polar solvent dissolving a polar solute
E)b and d only
11

Which of the following molecules dissolves in water?
A)CCl4
B)CBr4
C)C6H6
D)CH3OH
12

N-heptyl alcohol has a solubility of 0.9 g/L. How much of it will form a saturated solution with 25 mL of water?
A)0.045g
B)0.0225g
C)11.5g
D)22.5g
13

Solutes can be
A)gases.
B)liquids.
C)solids.
D)all of the above.
14

Gases have a higher solubility in __ water than in __ water.
A)cold, hot
B)hot, cold
C)lukewarm, cold
D)none of the above
15

Water can act as a(n) __ to dissolve limestone to a small extent.
A)base
B)salt
C)acid
D)electrolyte
16

Which of the following ions is most responsible for hard water?
A)Ca2+
B)Fe2+
C)Mg2+
D)Sr2+
17

Colligative properties of a solution are identified with __ of a solution
A)lowering vapor pressure
B)lowering freezing point
C)elevating boiling point
D)elevating osmotic pressure
E)all of the above
18

What is the boiling point of a solution of 66 grams of sugar (C12H11O11) dissolved in 500 grams of water?
A)100.05o C
B)100o C
C)100.2o C
D)98.8o C
19

How many grams of water must be added to 80.0 g of sodium chloride (NaCl) to prepare a 0.23m solution?
A)0.0595g
B)6.00g
C)6.00 x 103g
D)0.0815g
20

Calculate the molality by mass of a 14.0% nitric acid (HNO3) solution.
A)163m
B)0.163m
C)0.00258m
D)2.22m





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