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Water And Aqueous Systems Chapter 15 Chemistry

52 Questions  I  By Verdun
Chemistry Quizzes & Trivia
WATER AND AQUEOUS SYSTEMS          &nbs p;           chapter 15 Chemistry 

  
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1.  What unique molecular compound is the foundation of all life on Earth? 
A.
B.
C.
2.  Approximately what fraction of Earth's surface is covered in water?       
A.
B.
C.
3.  ln a _________________, the less electronegative hydrogen atoms acquire a slight positive charge and the oxygen atom acquires a slight negative charge.
A.
B.
C.
4.  A. High surface tension     B.low vapor pressure   C.high specific heat capacity   D.high heat of vaporization  E. high boiling point 
A.
B.
C.
5.  Because the ______________ has an H — O — H bond angle of 105°, the molecule as a whole is polar.  
A.
B.
C.
6.  In a full glass of water, the water surface seems to bulge over the rim of the glass. Water forms nearly spherical drops at the end of an eyedropper.           An insect called a water strider is able to "walk" on water.
A.
B.
C.
7.  Why does a water drop have surface tension?
A.
B.
C.
8.  What geometric shape has the smallest surface area for a given volume? 
A.
B.
C.
9.  Detergent molecules interfere with hydrogen bonding between water molecules. Detergents act as "wetting agents." When detergents reduce surface tension, beads of water collapse and the water spreads out.
A.
B.
C.
10.  Do liquids that have higher surface tension produce drops that are flatter or more nearly spherical than liquids with lower surface tension?
A.
B.
C.
11.  What is the name for an agent, such as a detergent, that has the ability to reduce surface tension?
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B.
C.
12.  The high specific heat capacity of water is due to_____________ bonding.
A.
B.
C.
13.  Is the following sentence maybe, true or false? Iron requires nearly 10 times more heat than an equal mass of liquid water to produce the same temperature increase.
A.
B.
C.
14.  What effect does a large body of water have on the daily temperature of the air around it?
A.
B.
C.
15.  Is the following sentence sometimes, true or false? Because of hydrogen bonding, water absorbs a large amount of heat as it evaporates or vaporizes.
A.
B.
C.
16.  The amount of heat given off during the condensation of one gram of water is the same as the amount of heat absorbed by one gram of water when it vaporizes.                                    An extensive network of hydrogen bonds tightly holds the molecules in liquid water together.
A.
B.
C.
17.  How are the evaporation and condensation of water important to regional temperatures on Earth? 
A.
B.
C.
18.  What is unusual about the boiling point of water? How can this difference be explained? 
A.
B.
C.
19.  What happens to the density of most substances as they cool and solidify?
A.
B.
C.
20.  Why is ice less dense than liquid water?
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B.
C.
21.              liquid water at 4 °C
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B.
C.
22.              liquid water at 0 °C 
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B.
C.
23.  ice at 0 °C
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B.
C.
24.  What is unusual about the data in Question 23? Will ice float on liquid water?
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B.
C.
25.  Water samples containing dissolved substances are called 
A.
B.
C.
26.  dissolving medium
A.
B.
C.
27.  dissolved particles
A.
B.
C.
28.  . homogeneous mixture of particles in  a dissolving medium
A.
B.
C.
29.  Is the following sentence maybe, true or false? After sodium chloride dissolves in a container of water, the sodium chloride will eventually settle to the bottom of  the container if the solution remains undisturbed at a constant temperature.
A.
B.
C.
30.  Solute particles can be either ionic or molecular, and their average diameters are usually less than 1.0 nanometers. When a solution is filtered, both solute and solvent will pass through the filter paper. Ionic compounds and substances containing polar covalent molecules readily dissolve in water.
A.
B.
C.
31.  Is the following sentence maybe, true or false? Solvents and solutes may be gases, liquids, or solids.
A.
B.
C.
32.  When a solid crystal of sodium chloride is placed in water, what happens?
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B.
C.
33.  What process occurs when solute ions become surrounded by solvent molecules?
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B.
C.
34.  Look at the model of solvation in Figure 17.12 on page 483. If there is enough solvent, what will eventually happen to the ionic solid depicted on the left side of the diagram?
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B.
C.
35.  Select the sentence that best explains why the ionic compounds barium sulfate (BaSOJ and calcium carbonate (CaCO3) are nearly insoluble in water.
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B.
C.
36.  What saying sums up the observation that, as a rule, polar solvents dissolve ionic compounds and polar molecules, but nonpolar solvents dissolve nonpolar compounds?       
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B.
C.
37.  What types of compounds can carry an electric current in the molten state or in aqueous solution?
A.
B.
C.
38.  Is the following sentencemaybe,  true or false? All ionic compounds are electrolytes.
A.
B.
C.
39.  Compounds that do not conduct an electric current in either aqueous solution or the molten state are called
A.
B.
C.
40.  Water in a crystal that is an integral part of the crystal structure is called 
A.
B.
C.
41.  A compound that contains water as an integral part of its crystal structure is called
A.
B.
C.
42.  What does " .5H2O" mean when included in a chemical formula?
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B.
C.
43.  Crystals of copper sulfate pentahydrate always contain five molecules of water for each copper and sulfate ion pair.  Heating blue crystals of copper sulfate pentahydrate above 100 °C drives off the water of hydration, leaving a white anhydrous powder.  It is possible to regenerate copper sulfate pentahydrate by treating an hydrous copper sulfate with water.
A.
B.
C.
44.  If a hydrate has a vapor pressure greater than that of the water in the surrounding air, the hydrate will lose water to the air, or        
A.
B.
C.
45.  Hygroscopic substances that remove water from the air are used as drying agents called
A.
B.
C.
46.  What happens to dry sodium hydroxide pellets that are exposed to normally moist air? What kind of compound exhibits this behavior?
A.
B.
C.
47.  Is the following sentence maybe, true or false? Heterogeneous mixtures are not true solutions.
A.
B.
C.
48.  Heterogeneous mixtures in which particles settle out upon standing are called
A.
B.
C.
49.   Is the following sentencemaybe, true or false? When a suspension of clay particles in water is filtered, both clay and water will pass through the filter paper.
A.
B.
C.
50.  Heterogeneous mixtures in which particles are of intermediate size between those of true solutions and suspensions are called
A.
B.
C.
51.  The scattering of light in all directions by colloidal particles is known as the
A.
B.
C.
52.  Oil spills cause environmental problems because the__________ oil spreads out across the water.  As it spreads, it can come into contact with plants and animals. Oil clogs pores and does other damage to the life cycle of living organisms.
A.
B.
C.
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