Ind. Hygiene: Test 2 Review

Front 1

a TOXIC EFFECT is any irreversible harmful effect on the body as a result of contact with a substance via the respiratory tract, skin, eye, mouth, or other route T or F?

Back 1

False, its reversable or irriversable

Front 2

A good example of a substance that has unique effects on multiple organ is organic lead T or F?

Back 2

False, Inorganic lead

Front 3

LETHAL CONCENTRATION is usually expressed as milligrams per kilogram or ppm T or F?

Back 3

False, milligrams per cubic meter.
LETHAL DOSE is milligrams per kilogram or ppm.

Front 4

The response to a new chemical can be assumed by the analogous to that produced by contact with a substance having a similar chemical and biological structure T or F?

Back 4

True

Front 5

One of the shortcomings of air standards is the difficulty in acquiring a truly representative breathing zone sample T or F?

Back 5

True

Front 6

Considered a central nervous system depressant?

Back 6

Acetone

Front 7

The total amount of a toxic compound absorbed via respiratory pathways depends on __________?

Back 7

- It's CONCENTRATION in the air

- Pulmonary VENTALLATION problems

- The DURATION of exposure

Front 8

In addition to providing the EPA with test data and other information about the safety of a new chemical, a company is required to notify the EPA _______ before starting to manufacture the chemical?

Back 8

90 days

Front 9

According to the ACGIH's rating system for carcinogenic substances, a substance with a rating of A4 is _______?

Back 9

Not classified as a human carcinogen

Front 10

Acetone may be detected using either a urine sample or a blood sample T or F?

Back 10

True

Front 11

The cutaneous absorption rate of some organic chemicals increases when ______and ______ increase?

Back 11

Temperature and Perspiration

Front 12

The dose-response relationship can be expressed as the product of two variables. What are these varibles?

Back 12

Concentration (C) and Duration (T)

Front 13

The occurrence of the usual health effects caused by a substance following exposure to air levels below those associated with effects to most individuals?

Back 13

Hypersusceptibility

Front 14

According to in NIOSH, when should a substance be considered as SUSPECTED carcinogen to humans?

Back 14

If it produces cancers in two or more animal species.

Front 15

If epidemiological data and cases of human exposure are not available for study, what is the preferred method for determining TLV's?

Back 15

Longterm inhalation test studies involving several animal species at concentrations both above and below the lowest effect level.

Front 16

Rates of _____, ______ and _____ determine when it is most appropriate to analyze biological samples in relation to duration and time of exposure?

Back 16

absorption, metabolism, and excretion

Front 17

What types of samples are used to determine BIOLOGICAL EXPOSURE INDICES?

Back 17

-Urine
-Blood
-Expired air

Front 18

Is the ABILITY of a substance to cause an unwanted effect when the substance has reached a sufficient concentration at a certain site in the body ?

Back 18

Toxicity

Front 19

Is the PROPABILITY that a concentration will occur at a certain site in the body?

Back 19

Hazard

Front 20

Toxicity, along with the chemical and physical properties of a substance, determine the level or degree of a hazard T or F?

Back 20

True

Front 21

A toxic substance can enter the body by more than one route depending on its specific properties T or F?

Back 21

True

Front 22

Although all substances produced harmful effects at some dose, a toxic substance causes harmful effects at low doses?

Back 22

True

Front 23

Irritation from airborne contaminates is generally reversible after short-term exposure T or F ?

Back 23

True

Front 24

Animal testing is an accurate and easy means of measuring the toxicity of a chemical for humans and determining acceptable Threshold Limit Values T or F?

Back 24

False

Front 25

If a substance is not included on the Toxic Substances List, the substance is not toxic
T or F ?

Back 25

False

Front 26

Factors used to determine the degree of hazard of a toxic substance?

Back 26

-Route of Entry
-Enviornmental varibles
-Physiological state

Front 27

Prolonged exposure is typically defined as

____, ____ , or ____ weeks?

Back 27

2, 4, or 6 weeks

Front 28

Carbon monoxide is NOT a simple asphyxiant

T or F?

Back 28

True, cause its a chemical asphyxiant

Front 29

DESCRIPTIVE human epidemiological data identifies a change in prevalence of a disease in a subgroup of a population T or F ?

Back 29

True

Front 30

______ ______ measures the composition of the external environment surrounding the worker?

Back 30

Air monitoring

Front 31

Irritants are often grouped according to their site of action T or F?

Back 31

True

Front 32

The toxicity of a chemical depends on _______?

Back 32

The degree of EXPOSURE and ABSORPTION

Front 33

What is the "Hazcom" or "right-to-know" regulation?

Back 33

29 CFR 1910.1200
Hazard Communication Standard

Front 34

With 2 or more hazardous substances that act on the same body organ system are present, primary consideration should be given to ________?

Back 34

Their combined effect

Front 35

When filling out a Material Safety Data Sheet for a substance made from ingredients that are a trade secret, is a company required to name the ingredients?

Back 35

No, the company can withhold the names of the ingredients, but it must disclose their hazardous properties, if any exist.

Front 36

The Dose of a substance that is expected to kill 50% of a defined experimental animal population, as determined from exposure to the substance by any route other than inhalation?

Back 36

LD50

Front 37

The concentration that produces no death in an experimental group and is the highest concentration tolerated in animals and is rarely used?

Back 37

LD0

Front 38

The lowest concentration that kills 100% of the exposed animals?

Back 38

LD100

Front 39

Can biological sampling be used in place of air sampling?

Back 39

Yes, but it should not be substituted for air sampling

Front 40

Measures the amount of chemical absorbed via any route(lungs, skin, mucus, etc.) as well as the effects of added stress. It shows the total exposure both on and off the job to harmful chemicals

Back 40

Biological Sampling

Front 41

What is the TSCA? It is administered by the Enviornmental Protection Agency (EPA)

Back 41

Toxic Substances Control Act

Front 42

What are the Federal Regulations Covering Industrial Toxicology?

Back 42

-OSHAct
-Toxic Substances Control Act
-NIOSH / OSHA Standards

Front 43

The health effect of a chemical exposure is considered "acute" if it ______ ?

Back 43

is relatively short-lived

Front 44

An agent that affects only the developing fetus?

Back 44

Teratogen

Front 45

An agent that affects the genetic material of an exposed organism?

Back 45

Mutagen

Front 46

A primary amyl alcohol. The substance in alcohol that makes you feel drunk?

Back 46

Isoamyl alcohol

Front 47

Ethyl Alcohol

Back 47

Ethanol

Front 48

What ethanol becomes after it metabolises in the body?

Back 48

Acetaldehyde

Front 49

______% of ETHYL ALCOHOL is absorbed in the stomach and ______% is absorbed in the lower intestine?

Back 49

20% in stomach and 80% in lower intestine

Front 50

A synthetic, deadly and ABSORBS rapidly in the grouin area of the body. It enters the central nervous system and is deadly.

Back 50

Phenol; used in plastics, disinfectants, slimicide, meds ( campophenic, throat lozenges)

Front 51

Highly acute toxin, known as a probable human carcinogen, can be INGESTED, affects the lungs and takes very little to kill you. Used in the rubber industry. 50-500ml per kilogram (2.2 Ibs) of body weight.

Back 51

Aniline

Front 52

Why is inhalation the most important route of entry for the human body?

Back 52

Because any airborne substance can be inhaled quickly due to us breathing

Front 53

ROE is an important factor to the toxicity of a substance T or F?

Back 53

True

Front 54

Most widely used substance throughout the industry, weak acid until it contacts water. Key component in batteries, waste water treatment, & manufacturing fertilizer.

Back 54

Sulfuric acid

Front 55

Used in coke, can be drunk?

Back 55

Phosphoric acid

Front 56

(C) concentration x (T) duration = ?

Back 56

Toxicity

Front 57

Refers to the ability of a chemical to cause harm to an organism as a result of REPEATED EXPOSURE OVER LONG PERIODS OF TIME?

Back 57

Chronic toxicity

Front 58

A substance that affects the part of the body it touches over a period of time (ex. sunlight, creosote)

Back 58

Chronic local

Front 59

A substance that effects the part of the body it touches in a short period of time?

Back 59

Acute local

Front 60

Absorption and distribution of a toxicant to a site beyond what it touches?

Back 60

Systemic

Front 61

A substance that affects a part of the body other than the one it touches (ex. syenide, bee sting, carbon monoxide, H2S)

Back 61

Acute systemic

Front 62

A substance that affects the body other than the one that it touches over a long period of time?

Back 62

Chronic systemic

Front 63

IDLH

Back 63

Immediately Dangerous to Life and Health

Front 64

If a manufacturer intends to introduce a new chemical, it is required by law to test the substance on animals such as rabbits, mice and rats T or F?

Back 64

True

Front 65

Concentration of a chemical in air exposed for 4 hours to kill 50% of animals by INHALATION.

Back 65

LC50

Front 66

The maximum concentration of a chemical that you may be exposed to 8 hours a day, 40 hours a week over your working life time with no ill effects from nearly all workers

Back 66

TLV's / PEL's

Front 67

An inert odorless gas that makes up 79% of our atmosphere. It is used for purging permanently mounted gages like corrosion, flow controllers, purge systems of oxygen, and in tanks to prevent explosions due to flammable vapors?

Back 67

Nitrogen

Front 68

O2 compromises what percent of the air we breathe? At what percent does an atmosphere become oxygen deficient?

Back 68

-Compromises 21% of the air we breathe.

-Becomes oxygen deficient at 16% at sea level

Front 69

Nitrogen (N2) gas hazards are not limited to the inside of confined spaces T or F ?

Back 69

True

Front 70

The American Petroleum Institute (API) is the oil industries leading training organization T of F ?

Back 70

True

Front 71

The percent of oxygen in the air is exactly the same in Beaumont, Texas, as it is in Denver, Colorado T or F?

Back 71

True

Front 72

The total pressure pushing down on us in Beaumont Texas today is ______mm Mercury and it is ______mm Mercury in colorado?

Back 72

770mm Mercury in Bmt and 760mm Mercury in Colorado.

Front 73

Since the pressure due to oxygen in Denver is less than the pressure due to oxygen in Beaumont, you have to breathe faster to get the same amount of oxygen in your lungs T or F?

Back 73

True

Front 74

The % of oxygen at the top of Mt. Everest is_____?

Back 74

20.9%

Front 75

Solvents are good for cleaning materials, but should not be used to transport solutes T or F?

Back 75

False

Front 76

In general, their is a high potential hazard for inhaling vapors from aqueous solutions T or F?

Back 76

False

Front 77

Water is a highly polar solvent T or F?

Back 77

True

Front 78

In the US, TLV's have been adopted as a legal standard T or F?

Back 78

False

Front 79

Benzene is now indicated as a leukemogenic agent, which has greatly increased its use as a solvent T or F?

Back 79

False

Front 80

All alcohols are formed by the replacement of one or more hydrogen atoms by one or more hydroxyl groups T or F?

Back 80

True

Front 81

A ______ is a formless fluid that completely fills its container and that exerts at equal pressure in all directions?

Back 81

Gas

Front 82

Vapor pressure is highly dependent on _______?

Back 82

Temperature

Front 83

Compounds with only carbon and hydrogen atoms are called ________?

Back 83

Hydrocarbons

Front 84

The ______ of a LIQUID is the lowest temperature at which it gives off enough vapor to form an ignitable mixture with the air near the surface of the liquid?

Back 84

Flash point

Front 85

Sophoric acid is most likely to be an upper respiratory tract irritant T or F ?

Back 85

True

Front 86

_____% is the minimum percentage of atmospheric oxygen required to support life?

Back 86

18 percent

Front 87

What are the 3 fundamental states of matter?

Back 87

- gases

- liquids

- solids

Front 88

What are the most commonly used guidelines in the United States to assist industrial hygienist in interpreting the hazard posed by specific concentrations of gases and vapors in the workplace?

Back 88

- TLV's

- PEL's

- REL's

Front 89

What is a functional group in an organic molecule?

Back 89

A region where reactions can take place

Front 90

Name at least one reference manual used for classifying and understanding the composition of a SOLVENT?

Back 90

The Merk Index

Front 91

Organic chemistry is the chemistry of the compound of oxygen T or F?

Back 91

False

Front 92

Esters should never be used as an anesthetic T or F?

Back 92

True

Front 93

The greatest safety hazard of saturated and unsaturated alkyl esthers is that they have a tendency to form explosive peroxidesT or F?

Back 93

True

Front 94

Respirators can be used as the primary or only means of protection against hazardous chemicals T or F?

Back 94

False

Front 95

Hydrocarbons are a major factor in the formation of photochemical smog T or F?

Back 95

True

Front 96

The ANSI Z87.1 standard has removed the prohibition on contact lenses in eye hazard areas T or F?

Back 96

True

Front 97

Barrier creams are every bit as effective as impervious gloves T or F?

Back 97

False

Front 98

The fire point of a liquid is usually about _____ the flash point temperature?

Back 98

5 F above

Front 99

Which of the following is a chemical asphyxiant?

-nitrogen

-hydrogen

-carbon monoxide

-carbon dioxide

Back 99

Carbon monoxide

Front 100

Aliphatic compounds take their name from the Greek word aliphe, meaning ______?

Back 100

Fat

Front 101

It is estimated that there are _____ different hydrocarbons in gasoline?

Back 101

500

Front 102

Which of the following have been used as anesthetics?

- cyclic hydrocarbons

- aliphatic hydrocarbons

- lipophilic solvents

- none of the above

Back 102

Cyclic hydrocarbons

Front 103

Which of the following is an important solvent for acetate rayon and vinyl resin coatings?

- aldehydes

- methanol alcohol

- nitrohydrocarbons

- ketones

Back 103

Ketones

Front 104

What does NTP stand for?

Back 104

Normal tempature (25°C) and

pressure (1 atmosphere)

Front 105

What are the 8 classifications for common organic solvents?

Back 105

-aliphatic

-cyclic

-aromatic

-halogenated hydrocarbons

-ketones

-esters

-alcohols

-ethers

Front 106

What elements make up the halogens?

Back 106

-flourine

-chlorine

-bromine

-iodine

-astatine

Front 107

Methanol is one of the two most important industrial alcohols. What are some effects of its exposure?

Back 107

Methanol causes several types of injuries, notably impairment of vision and injury of the optic nerve

Front 108

Ethanol is one of the two most important industrial alcohols. What are some effects of its exposure?

Back 108

Ethanol is quickly metabolized in the body and largely converted to carbon dioxide, and is the least toxic of the alcohols. The undesirable effects of ethanol primarily are related to its recreational use, as it acts as a depressant, slowing down the central nervous system.

Front 109

The primary route of exposure for most hazardous particulate is inhalation T or F?

Back 109

True

Front 110

The number of asbestos fibers inhaled is not as important as the mass T or F?

Back 110

False

Front 111

The relative toxicity of the six forms of asbestos remains in debate T or F?

Back 111

True

Front 112

Most particles demonstrate toxicity only when they are deposited in the alveolar region of the respiratory tract T or F?

Back 112

False

Front 113

Excess cancer rates have been associated with living in houses with high levels of radon daughters T or F?

Back 113

False

Front 114

Both of the main analytical methods available for free crystalline silica are quite imprecise by industrial hygiene standards T or F?

Back 114

True

Front 115

Particles in a wide range of sizes are found in a

polydisperse particle cloud T or F?

Back 115

True

Front 116

Why is the aerodynamic equivalent diameter of a particle important?

Back 116

It determines where in the respiratory tract the particle is most likely to be deposited.

Front 117

What is one of the few particulate matters (PM's) that is routinely analyzed by size -selective microscopic counting?

Back 117

Asbestos

Front 118

Where are asbestos exposure and monitoring mostly found?

Back 118

Building maintenance and renovation

Front 119

Small (less than 100 micrometers in diameter) peices of solid materials, liquid droplets, or microbiologocal organisms?

Back 119

Particulate matter

Front 120

What is the most common method for differential fiber counting in asbestos sampling?

Back 120

Transmission Electron Microscopy (TEM)

Front 121

The environmental limit for exposure of the general population to particulate matter are generally much lower than the occupational limit T of F?

Back 121

True

Front 122

OSHA requires pre-exposure medical assessment for workers who will be exposed to certain hazardous particulates T or F?

Back 122

False

Front 123

The majority of occupational exposure limits are based on the results of air sampling T or F?

Back 123

True

Front 124

Diesel exhaust has been shown to be carcinogenic T or F?

Back 124

True

Front 125

It is unusual for an industrial hygienist to be asked to sample for infectious airborne bacteria, fungal spores, or viruses T or F?

Back 125

True

Front 126

Which of the followig is often a primary factor for the toxicity of a material?

- size of particles

- number of particles

- length of exposure

- chemical composition

Back 126

Chemical composition

Front 127

What regulates most U.S. exposure levels for particulate matter?

-OSHA PELs

-NIOSH RELs

-AIHA WEELs

-ACGIH TLVs

Back 127

OSHA PELs

Front 128

Most samples taken to assess exposure to particular matter are _______?

Back 128

Air samples

Front 129

What work force is especially subject to radon progeny exposure?

Back 129

Mining

Front 130

The accumulation of dust in the lungs and the tissue reaction to its presence?

Back 130

Pneumoconiosis

Front 131

A value never to exceed even for a short time?

Back 131

Ceiling limit

Front 132

A type of scarring of the lung tissue, which results in loss of flexibility, difficulty breathing, and in severe cases, damage to the right side of the heart as it tries to compensate for reduced blood oxygen?

Back 132

Fibrosis

Front 133

What biological organisms are most often of interest to the typical industrial hygienist?

Back 133

- bacteria

- fungus

- viruses

Front 134

Noise does not always have particular physical characteristics that distinguish it from wanted sound T or F?

Back 134

True

Front 135

The sound power radiated from a source remains constant even though intensity diminishes as the distance from the source increases T or F?

Back 135

True

Front 136

An individual's ability to hear sentences and repeat them correctly in a quiet environment is not satisfactory evidence of adequate hearing ability because it does not demonstrate the person's ability to hear pure tones T or F?

Back 136

False

Front 137

Sound can be transmitted to the inner ear by hearing protective devices, such as earplugs and earmuffs T or F?

Back 137

True

Front 138

A hearing conservation program becomes mandatory at an 8-hour TWA exposure of 90 dBA

T or F?

Back 138

False, 85 dBA

Front 139

The following statement does not apply to frequencies?

"Broadband noise can be somewhat more harmful than single frequencies" T or F?

Back 139

True

Front 140

What is the answer to the following equation:

75 dB + 71 dB = ?

Back 140

76 dB

Front 141

Most damage risk criteria are written for _____ _____ because it is the easiest to define in terms of amplitude, frequency content, and duration?

Back 141

Continuous noise

Front 142

Which of the following protective devices can reduce bone-conducted sound?

-earmuffs

-earplugs

-canal caps

-helmets

Back 142

Helmets

Front 143

Which of the following Industries is not covered by the Hearing Conservation Amendment?

-agriculture

-gas well drilling

-construction

-all the above

Back 143

All the above

Front 144

A hearing impairment of one or both ears, partial or complete, that results from one's employment?

Back 144

Occupational Hearing Loss

Front 145

Changing the frequency of a sound changes its relative loudness. Why?

Back 145

Because the human ear is more sensitive to the higher frequencies of sound.

Front 146

If an employee has experienced a standard threshold shift (STS), a protective device must reduce his or her level of noise exposure to ______ or below?

Back 146

85 dBA

Front 147

A wall is not an effective shield against low frequency sounds, but it can offer more protection against high frequency sounds T or F?

Back 147

True

Front 148

Doubling sound pressure is the equivalent of doubling sound power T or F?

Back 148

False

Front 149

The range of greatest interest in most noise measurements is between 20 Hz and 20,000 Hz. T or F?

Back 149

False

Front 150

OSHA sets specific standards for noise generating equipment. These standards can be used as one type of administrative control for noise hazards T or F?

Back 150

False

Front 151

A biological check of an audiometer is done by testing the hearing of a person whose hearing threshold is known and stable T or F?

Back 151

True

Front 152

The following is true of noise-induced hearing loss:

it usually affects one ear in the extent and degree of loss T of F?

Back 152

False, it usually affects both ears equally

Front 153

The threshold of hearing can vary as much as

_____ dB among healthy individuals?

Back 153

10 dB

Front 154

Which of the following is a critical factor in the analysis of noise exposure?

- the frequency composition

- the duration of noise exposure

- the A-weighted sound level

- all the above

Back 154

All the above

Front 155

If the noise level around a workstation is never greater than _____, the employees noise exposure can be considered satisfactory?

Back 155

85 dBA

Front 156

What is the best hearing protective equipment for a worker who is only exposed to hazardous noise intermittently?

Back 156

Earmuffs

Front 157

What is a practical way of measuring the noise exposure of workers who perform a variety of tasks in different locations?

Back 157

A noise dosimeter

Front 158

The weakest sound that can be heard by a person with very good hearing in an extremely quiet location?

Back 158

Threshold of hearing

Front 159

What is the one serious drawback of earplugs and earmuffs as hearing protective devices?

Back 159

They do not reduce or eliminate a noise hazard

Front 160

The upper limit of frequency at which airborne sounds can be heard depends primarily on the _____ and ______?

Back 160

Condition of a persons hearing &

Intensity

Front 161

Denotes injury to these sensor neural elements of the inner ear. It is produced by one or a few exposures to sudden intense acoustic forms of energy resulting from blasts and explosions or by direct trauma to the head or earm?

Back 161

Acoustic trauma

Front 162

Describes the cumulative permanent loss of hearing- Always of the sensorineural type that develops over months or years of hazardous noise exposure?

Back 162

Noise-induced hearing loss

Front 163

Refers to non audible acoustic phenomenon that are recognized by the tactile experience of touch, or feeling?

Back 163

Vibration

Front 164

Refers to the form of energy that produces a sensation perceived by the sense of hearing in humans?

Back 164

Sound

Front 165

Every noise problem can be broken down into three parts. What are these parts?

Back 165

- the SOURCE that radiates the sound energy

- the PATH along which the sound energy travels

- the RECEIVER

Front 166

Rate at which pressure oscillations are produced. One hertz is equivalent to one cycle per second. A subjective characteristic of sound related to frequency is pitch.

Back 166

Frequency (in Hz)

Front 167

The frequency measured in cycles per second?

Back 167

Hertz (1cycle per second = 1Hz)

Front 168

Loudness based on human ear response?

Back 168

dBA

Front 169

The preffered unit to measure sound?

Back 169

Decibel (dB)

Front 170

The loudness of sound?

Back 170

Amplitude

Front 171

Not caused by noise exposure, but by any disorder in a middle or external ear that prevents sound from reaching the inner ear?

Back 171

Conductive hearing loss

Front 172

Divides the middle ear from the inner ear?

Back 172

Oval window

Front 173

When an entire audiogram decreases due to noise but returns to normal after a period of rest?

Back 173

Temporary Threshold Shift

Front 174

The snail shaped part of the inner ear?

Back 174

Cochlea

Front 175

A reduction in a person's level of hearing?

Back 175

Threshold Shift

Front 176

Found in the inner ear, it regulates balance for the body?

Back 176

Vestibular system

Front 177

Suggested baseline of noise tolerance; which if not exceeded, should result in no hearing loss due to noise?

Back 177

Damage Risk Criteria

Front 178

An organic chemical compound that is soluble in water. It is a component of products derived from coal and petroleum. It is found in gasoline and other fuels?

Back 178

Benzene

Front 179

Anything with a PH of 2 or <

Back 179

Acid

Front 180

Helped write a safety text book and worked at Lamar University?

Back 180

John Montgomery

Front 181

OSHA states that you can never be exposed to

115 dB? T or F

Back 181

True

Front 182

Actual sound level pressure?

Back 182

dBC

Front 183

Rythmatic means of average between the dBA and dBC?

Back 183

dBB

Front 184

ADD

Back 184

Average Daily Dose

Front 185

What standard is 1910.95?

Back 185

Occulational noise exposure

Front 186

A naturally occurring mineral. Found in the air anywhere.

Back 186

Asbestos

Front 187

Lethal concentration (LC) is used for ______ ______?

Back 187

airborne materials

Front 188

______ ______ usually pertains to acute effects and rapid death ( minutes or hours)

Back 188

Lethal dose

Front 189

______ ______ is material that exerts little systemic toxic action, either because the products formed on the tissue of the respiratory tract or nontoxic or because the irritant action at the contact site is far greater than any systemic toxic action?

Back 189

Primary irritant

Front 190

______ ______ produces irritant action on mucous membranes, but this effect is overshadowed by systemic effects resulting from absorption?

Back 190

Secondary irritants

Front 191

______ ______ or illness is characterized by symptoms or disease of long duration or frequent recurrence?

Back 191

Chronic effects

Front 192

______ ______ refers to continued or repeated exposure over a prolonged period, usually years?

Back 192

Chronic exposure

Front 193

______ is an inflammation or aggravation of the tissue the substance contacts?

Back 193

Irritation

Front 194

Allergy, also known medically as ______, is often confused with hypersusceptibility?

Back 194

Hypersensitivity

Front 195

Anything with a PH of 12 or > is very ______ to the body.

Back 195

Corrosive

Front 196

A substance that causes visible destruction or permanent changes in human skin at the site of contact?

Back 196

Corrosive

Front 197

A substance that dissolves another substance?

Back 197

Solvent

Front 198

Chemical compound containing the hydroxyl group, one that releases a hydroxy when dissolved?

Back 198

Hydroxides

Front 199

Use this simplified schedule to add decibels

Back 199

:) :) :) :)

Front 200

Chemicals that contain carbon?

Back 200

Organic compound

Front 201

Chemicals used to designate compounds that generally do NOT contain carbon, whose source is matter other than vegetable or animal?

Back 201

Inorganic compound

Front 202

Fields of chemistry?

Back 202

-Organic

-Inorganic

-Physical

-Bio