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Weber, Hazardous Materials Technician Chapter 5
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Weber, Hazardous Materials Technician
Chapter 5: Chemical and Physical Properties
When one substance interacts and combines with another substance, forming one or more different substances describes a(n): (p. 117 )
Chemical compatibility
Exothermic reaction
Chemical reactivity
Endothermic reactivity
Which of the following statements BEST describes an exothermic reaction? (p.117 )
A chemical reaction that liberates heat
A chemical reaction that absorbs heat
A chemical that reacts quickly
A chemical that reacts slowly
The rate of a chemical reaction depends on several factors. Which of the following factors is CORRECT? (p. 117)
The temperature and amount of the material
The concentration and the pressure of the material
The presence of any catalysts
All of above
A chemical used to increase the stability of highly reactive chemicals during transport and storage is called a(n): (p. 117)
Catalysis
Inhibitor
Oxidizer
Reducing agent
A rapid rate of oxidation that releases a large amount of energy very quickly describes: (p. 118)
Oxidization
Combustion
Radiation
Corrosiveness
A chemicals ability to take electrons from a fuel refers to its: (p.118 )
Oxidizing ability
Reducing potential
Polymerization ability
Combustion potential
Which exothermic reaction occurs when a relatively homogenous material is able to react with itself? (p.119 )
Oxidization
Combustion
Decomposition
Polymerization
_______________materials may cause severe chemical burns and extensive tissue damage on contact. (p. 120)
Cryogenic
Corrosive
Radioactive
Carcinogenic
Which of the following statements about the pH scale is CORRECT? (p.120 )
pH is the concentration of electrons in a solution
The more protons there are in a solution, the more caustic
A pH of seven is considered neutral
A pH that is below seven is considered basic
Examples of physical properties are: (p.123 )
Boiling point and vapor pressure
Ignition temperature
Flash point and lower explosive limit
Alkalis and caustic
A chemical reaction that takes in heat during a reaction describes a(n): (p.117 )
Exothermic reaction
Endothermic reaction
Combustion
Oxidation
A chemical reaction that gives off heat is called a(n): (p.117 )
Exothermic reaction
Explosion
Endothermic reaction
Spontaneous combustion
If the chemical properties of a substance remain unchanged and the appearance or shape of an substance changes it is called a: (p.123 )
Chemical change
Physical change
Neither a physical or chemical change
Both a physical and chemical change
The temperature at which a liquid gives off enough vapor to ignite, but NOT necessarily to sustain combustion describes: (p.138 )
Flame point
Fire point
Flash point
Auto ignition temperature
The temperature at which a material will initiate self-sustained combustion without an external ignition source describes: (p.138 )
Auto ignition temperature
Flash point
Flame point
Fire point
A material that has the ability to mix completely in all proportions in water is considered to be: (p.133 )
Dissolvable
Miscible
Soluble
Insoluble
A weight of a specific volume of liquid compared to the weight of an equal volume of water describes: (p.134 )
Vapor density
Proportional weight
Mass ratio
Specific gravity
A chemical in a gaseous form with a vapor density of greater than one will: (p.130 )
Result in a physical change
Rise
Sink
Change it chemical properties
The higher the vapor pressure of a chemical: (p. 128 )
The more rapidly the chemical evaporates
The slower the chemical evaporates
The quicker the vapor will rise in air
The quicker the vapor will sink in air
The comparison of the volume a specific amount of gas occupies to the volume that the gas occupies at a specific temperature and pressure refers to its: (p.126 )
Vapor-to-mass ratio
Vapor-to-gas ratio
Expansion ratio
Vapor proportionality
Answer Key:
1. c
2. a
3. d
4. b
5. b
6. a
7. d
8. b
9. c
10. a
11. b
12. a
13. b
14. c
15. a
16. b
17. d
18. c
19. a
20. c
Weber, Hazardous Materials Technician ©2013 by Education, Inc.
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