Question 1

A volatile organic compound that is widely used as a dry-cleaning solvent and degreasing compound and is now found in trace amounts in groundwater is

Accepted Answer

A)  methane.
B)  benzene.
C)  formic acid.
D)  trichloroethylene.

Question 2

A characteristic of a lake dying from acidification is that the only surviving fish are

Accepted Answer

A)  old.
B)  young.
C)  female.
D)  male.

Question 3

Industries in the United States have significantly reduced their contribution to water pollution in recent years.

Accepted Answer

A) True 
 B)False

Question 4

All of the following statements are true of hard water EXCEPT

Accepted Answer

A)  it contains calcium salts.
B)  it contains iron salts.
C)  it contains only Na⁺ and K⁺ ions.
D)  it forms an insoluble scum with soap.

Question 5

The EPA drinking water standard for toluene is 3 mg/L.What is this concentration in ppm?

Accepted Answer

A)  0) 003
B)  0) 3
C)  3
D)  3000

Question 6

Rainwater is

Accepted Answer

A)  slightly acidic because it reacts with dissolved CO₂ gas.
B)  slightly basic because it reacts with dissolved CO₂ gas.
C)  slightly acidic because it reacts with dissolved radon gas.
D)  slightly basic because it reacts with dissolved radon gas.

Question 7

What percentage of public water supplies in the United States do NOT meet one or more of the EPA water standards?

Accepted Answer

A)  1 %
B)  25 %
C)  10 %
D)  70 %

Question 8

Along with fertilizers which increase BOD,which class of agricultural chemicals often contaminate water?

Accepted Answer

A)  toxic metal
B)  crude oil
C)  pesticides
D)  radioisotopes

Question 9

To use clean water is to abuse it.Each of us can do our share by ________ water and ________ our use of products that require vast amounts of water to make.

Accepted Answer

conserving...

Question 10

Once groundwater is contaminated,it is very difficult to purify.Discuss this problem of groundwater sources of water with respect to the water cycle.

Accepted Answer

Groundwater contamination is a serious p...

Question 11

Why is it virtually impossible to find pure water on Earth?

Accepted Answer

Water is a...

Question 12

The EPA drinking water standard for arsenic is 0.040 mg/L.What is this concentration in ppm?

Accepted Answer

A)  0) 040
B)  4
C)  40
D)  4000

Question 13

Which of the following is NOT a property of water?

Accepted Answer

A)  It has a higher density in the liquid state than in the solid state.
B)  It has a lower density than most liquids do.
C)  It dissolves most ionic substances.
D)  It has a high specific heat.

Question 14

Ozone treatment of the water supply is effective against viruses.

Accepted Answer

A) True 
 B)False

Question 15

________ million people on earth do not have access to adequate quantities of fresh water.

Accepted Answer

A)  100
B)  300
C)  875
D)  475

Question 16

Acid rain is a major problem for lakes with a limestone bedrock.

Accepted Answer

A) True 
 B)False

Question 17

Describe how the water cycle acts to purify water.

Accepted Answer

The water cycle acts to purify water thr...

Question 18

As the amount of organic material in a water system increases,the BOD

Accepted Answer

A)  decreases.
B)  remains constant.
C)  increases.
D)  cannot be predicted.

Question 19

Many wells in the United States are contaminated with the gasoline additive,

Accepted Answer

A)  lead.
B)  methyl tert-butyl ether.
C)  octane.
D)  chlorofluorocarbons.

Question 20

Zeolites can often be regenerated simply by soaking them in a salt solution.

Accepted Answer

A) True 
 B)False

Exam 14: Water

Once groundwater is contaminated,it is very difficult to purify.Discuss this problem of groundwater sources of water with respect to the water cycle.

Correct AnswerAnswered by ExamLex AIGroundwater contamination is a serious p...View AnswerShow Answer

Acid rain is a major problem for lakes with a limestone bedrock.

Correct AnswerverifiedShow Answer

All of the following statements are true of hard water EXCEPT

Correct AnswerverifiedShow Answer

The EPA drinking water standard for toluene is 3 mg/L.What is this concentration in ppm?

Correct AnswerverifiedShow Answer

Ozone treatment of the water supply is effective against viruses.

Correct AnswerverifiedShow Answer

The EPA drinking water standard for arsenic is 0.040 mg/L.What is this concentration in ppm?

Correct AnswerverifiedShow Answer

Which of the following is NOT a property of water?

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Many wells in the United States are contaminated with the gasoline additive,

Correct AnswerverifiedShow Answer

A characteristic of a lake dying from acidification is that the only surviving fish are

Correct AnswerverifiedShow Answer

A volatile organic compound that is widely used as a dry-cleaning solvent and degreasing compound and is now found in trace amounts in groundwater is

Correct AnswerverifiedShow Answer

To use clean water is to abuse it.Each of us can do our share by ________ water and ________ our use of products that require vast amounts of water to make.

Correct Answerverifiedconserving...View AnswerShow Answer

Zeolites can often be regenerated simply by soaking them in a salt solution.

Correct AnswerverifiedShow Answer

What percentage of public water supplies in the United States do NOT meet one or more of the EPA water standards?

Correct AnswerverifiedShow Answer

As the amount of organic material in a water system increases,the BOD

Correct AnswerverifiedShow Answer

Why is it virtually impossible to find pure water on Earth?

Correct AnswerverifiedWater is a...View AnswerShow Answer

________ million people on earth do not have access to adequate quantities of fresh water.

Correct AnswerverifiedShow Answer

Along with fertilizers which increase BOD,which class of agricultural chemicals often contaminate water?

Correct AnswerverifiedShow Answer

Describe how the water cycle acts to purify water.

Correct AnswerAnswered by ExamLex AIThe water cycle acts to purify water thr...View AnswerShow Answer

Industries in the United States have significantly reduced their contribution to water pollution in recent years.

Correct AnswerverifiedShow Answer

Rainwater is

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Answered by ExamLex AI
Groundwater contamination is a serious p...
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To use clean water is to abuse it.Each of us can do our share by water and our use of products that require vast amounts of water to make.

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conserving...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
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Water is a...
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Correct Answer
verified

Correct Answer
Answered by ExamLex AI
The water cycle acts to purify water thr...
View Answer

Correct Answer
verified

Correct Answer
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