Question 1

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

Question 2

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

Question 3

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. 
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 4

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

Accepted Answer

A) True 
 B)False

Question 5

Describe how the water cycle acts to purify water.

Accepted Answer

The water cycle acts to purify water thr

Question 6

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

Question 7

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

Accepted Answer

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

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

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. 
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 10

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

Question 11

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

Question 12

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

Question 13

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 14

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

Accepted Answer

A) True 
 B)False

Question 15

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

Question 16

Ozone treatment of the water supply is effective against viruses.

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

Water is a

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

Question 19

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 20

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. 
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.

Exam 14: Water

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

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

Rainwater is

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

Describe how the water cycle acts to purify water.

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

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

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

Which of the following is NOT a property of water?

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

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

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

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.

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

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

Ozone treatment of the water supply is effective against viruses.

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

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

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

All of the following statements are true of hard water EXCEPT

Chemistry

Atoms

Atomic Structure

Chemical Bonds

Chemical Accounting

Gases, Liquids, Solids, and Intermolecular Forces

Acids and Bases

Oxidation and Reduction

Organic Chemistry

Polymers

Nuclear Chemistry

Chemistry of the Earth

Air

Energy

Biochemistry

Food

Drugs

Fitness and Health

Chemistry Down on the Farm

Household Chemicals

Poisons

Filters

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.