Question 1

How do automatic dishwashing detergents differ from detergents used for the hand washing of dishes?

Accepted Answer

Automatic dishwashing detergents and han

Question 2

The outer layer of skin is called the

Accepted Answer

A) exoskin. 
B) episkin. 
C) epidermis. 
D) exodermis. 
A) exoskin. 
B) episkin. 
C) epidermis. 
D) exodermis.

Question 3

Which substance strengthens tooth enamel?

Accepted Answer

A) fluoride 
B) abrasive 
C) plaque 
D) protein 
A) fluoride 
B) abrasive 
C) plaque 
D) protein

Question 4

The molecule shown below is a

Accepted Answer

A) soap. 
B) detergent. 
C) fatty acid. 
D) polymer. 
A) soap. 
B) detergent. 
C) fatty acid. 
D) polymer.

Question 5

Why are perborate bleaches better for white,resin-treated,polyester-cotton fabrics than chlorine bleaches?

Accepted Answer

A) Chlorine bleaches release a toxic gas when in contact with this type of fabric. 
B) Chlorine bleaches ruin the fabric. 
C) Oxygen bleaches are cheaper. 
D) The fabric lasts longer. 
A) Chlorine bleaches release a toxic gas when in contact with this type of fabric. 
B) Chlorine bleaches ruin the fabric. 
C) Oxygen bleaches are cheaper. 
D) The fabric lasts longer.

Question 6

In cleaning,soap acts as a(n)________ between "dirt" and water.

Accepted Answer

A) catalyst 
B) chemical reactant 
C) emulsifier 
D) insulator 
A) catalyst 
B) chemical reactant 
C) emulsifier 
D) insulator

Question 7

Bathtub ring is caused by

Accepted Answer

A) the action of ammonia with water. 
B) precipitation of soap by "hard" metal ions. 
C) rust formation from sulfur in the water. 
D) soap and water cause a ringing sound in the ears. 
A) the action of ammonia with water. 
B) precipitation of soap by "hard" metal ions. 
C) rust formation from sulfur in the water. 
D) soap and water cause a ringing sound in the ears.

Question 8

Optical brighteners work by

Accepted Answer

A) absorbing blue rays and ultraviolet rays. 
B) absorbing ultraviolet rays and emitting blue rays. 
C) spontaneously emitting blue rays when they attach to clothing fibers. 
D) spontaneously emitting ultraviolet rays when they attach to clothing fibers. 
A) absorbing blue rays and ultraviolet rays. 
B) absorbing ultraviolet rays and emitting blue rays. 
C) spontaneously emitting blue rays when they attach to clothing fibers. 
D) spontaneously emitting ultraviolet rays when they attach to clothing fibers.

Question 9

The protein that forms the strand of hair is

Accepted Answer

A) cortex. 
B) cuticle. 
C) follicle. 
D) keratin. 
A) cortex. 
B) cuticle. 
C) follicle. 
D) keratin.

Question 10

The substance with the formula shown below is a(n)
CH₃CH₂CH₂CH₂CH₂CH₂CH₂CH₂CH₂CH₂CH₂COOH

Accepted Answer

A) alcohol. 
B) detergent. 
C) saponin. 
D) fatty acid. 
A) alcohol. 
B) detergent. 
C) saponin. 
D) fatty acid.

Question 11

The active ingredient in Rogaine was first used to treat high blood pressure.

Accepted Answer

A) True 
 B)False

Question 12

What substance is added to aftershave lotions to provide a cooling effect?

Accepted Answer

A) diethyl ether 
B) menthol 
C) 2-propanol 
D) propane 
A) diethyl ether 
B) menthol 
C) 2-propanol 
D) propane

Question 13

Fabric softeners are cationic surfactants.

Accepted Answer

A) True 
 B)False

Question 14

Describe how the structure of a soap molecule makes it an effective cleaning agent in water.

Accepted Answer

The structure of a soap molecule makes i

Question 15

What type of chemical is most effective in removing the build-up of "lime" that is often found in toilet bowls?

Accepted Answer

A) an abrasive 
B) an acid 
C) a base 
D) a bleach 
A) an abrasive 
B) an acid 
C) a base 
D) a bleach

Question 16

A cleaning product that may contain either ammonia or vinegar in a dilute solution of isopropyl (rubbing)alcohol would be used as a(n)

Accepted Answer

A) toilet bowl cleaner. 
B) oven cleaner. 
C) glass cleaner. 
D) drain cleaner. 
A) toilet bowl cleaner. 
B) oven cleaner. 
C) glass cleaner. 
D) drain cleaner.

Question 17

American pioneers combined potash solution and animal fat in a huge iron kettle and cooked it over several hours.The result was

Accepted Answer

A) detergent. 
B) soap. 
C) cooking oil. 
D) food for animals. 
A) detergent. 
B) soap. 
C) cooking oil. 
D) food for animals.

Question 18

Bleaches work by

Accepted Answer

A) changing the structure of color-producing groups called chromophores to make them colorless. 
B) acting directly on the soiled spot to remove the soil. 
C) changing the stains so that they absorb UV light and then release blue light. 
D) covering the stains with quaternary ammonium ions so that they are no longer visible. 
A) changing the structure of color-producing groups called chromophores to make them colorless. 
B) acting directly on the soiled spot to remove the soil. 
C) changing the stains so that they absorb UV light and then release blue light. 
D) covering the stains with quaternary ammonium ions so that they are no longer visible.

Question 19

Soap can be made by boiling animal fat with lye or potash for several hours.What is the major disadvantage to the lye soap made this way?

Accepted Answer

A) It did not clean well. 
B) It often contained unreacted alkali, which was very harsh on the skin. 
C) Glycerol separated out from the soap and remained on the bottom of the kettle. 
D) It did not kill bacteria. 
A) It did not clean well. 
B) It often contained unreacted alkali, which was very harsh on the skin. 
C) Glycerol separated out from the soap and remained on the bottom of the kettle. 
D) It did not kill bacteria.

Question 20

Modern toothpastes frequently contain fluorides,which help to reduce tooth decay.

Accepted Answer

A) True 
 B)False

Exam 21: Household Chemicals

How do automatic dishwashing detergents differ from detergents used for the hand washing of dishes?

The outer layer of skin is called the

Which substance strengthens tooth enamel?

The molecule shown below is a

Why are perborate bleaches better for white,resin-treated,polyester-cotton fabrics than chlorine bleaches?

In cleaning,soap acts as a(n)________ between "dirt" and water.

Bathtub ring is caused by

Optical brighteners work by

The protein that forms the strand of hair is

The substance with the formula shown below is a(n) CH₃CH₂CH₂CH₂CH₂CH₂CH₂CH₂CH₂CH₂CH₂COOH

The active ingredient in Rogaine was first used to treat high blood pressure.

What substance is added to aftershave lotions to provide a cooling effect?

Fabric softeners are cationic surfactants.

Describe how the structure of a soap molecule makes it an effective cleaning agent in water.

What type of chemical is most effective in removing the build-up of "lime" that is often found in toilet bowls?

A cleaning product that may contain either ammonia or vinegar in a dilute solution of isopropyl (rubbing)alcohol would be used as a(n)

American pioneers combined potash solution and animal fat in a huge iron kettle and cooked it over several hours.The result was

Bleaches work by

Soap can be made by boiling animal fat with lye or potash for several hours.What is the major disadvantage to the lye soap made this way?

Modern toothpastes frequently contain fluorides,which help to reduce tooth decay.

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

Water

Energy

Biochemistry

Food

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Fitness and Health

Chemistry Down on the Farm

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