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Chapter 12 A.M. Class Flashcards | StudBud
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Chapter 12 A.M. Class
Chapter 12 A.M. Class
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1
Sodium hydroxide, AKA _____, is a very strong alkali used in hair relaxers, callous softeners, and drain cleaners.
bleach
salt
lye
hydrogen peroxide
2
When a substance undergoes a _____ change, a new substance with different properties is created.
static
chemical
physical
primary
3
Ointments, pastes, and pomades are:
semisolid mixtures
solutions
powders
emulsions
4
The simplest form of chemical matter is a(n):
neutron
element
atom
cell
5
A _____ is a physical combination of matter in any proportions.
physical mixture
solvent
pure substance
compound
6
Two or more immiscible substances combine with a special binding ingredient to create a(n):
emulsion
suspension
solution
solvent
7
A _____ is a substance that allows oil and water to mix, or emulsify.
surfactant
reducing agent
solvent
solute
8
An oxidizing agent:
transforms another element into oxygen
releases oxygen
absorbs oxygen
transforms oxygen into another element
9
When stored under ideal conditions, a properly formulated emulsion can be stable for up to:
3 years
6 months
3 months
1 year
10
A substance's state of matter depends on its:
atomic number
size
electrical charge
temperature
11
A(n) _____ is a chemical combination of two or more atoms in definite (fixed) proportions.
element
cell
molecule
ion
12
Any substance that occupies space and has mass (weight) is considered:
carbon
matter
energy
light
13
Matter does NOT exist in which form?
liquid
solid
gas
energy
14
Which of the following is an example of a chemical property?
melting point
glossiness
solubility
ability of wood to burn
15
A stable physical mixture of two or more substances is a(n):
emulsion
suspension
element
solution
16
The _____ is the substance that is dissolved into a solution.
emulsion
surfactant
solute
solvent
17
An elemental molecule is a molecule containing:
two or more atoms of the same element in definite proportions
a single atom
two or more atoms of the same element in indefinite proportions
two or more atoms of two different elements in definite proportions
18
Which of the following is NOT a physical mixture?
element
suspension
emulsion
solution
19
An ion with a positive electrical charge is called a(n):
alkali
cation
anion
base
20
A(n) _____ releases a significant amount of heat.
physical change
chemical change
endothermic reaction
exothermic reaction
21
Nail polish is an example of a(n):
suspension
solution
surfactant
emulsion
22
Which of the following is a special type of oil used in water-resistant lubricants for the skin?
glycerin
silicone
ammonia
alkanolamine
23
Steam is an example of a:
solid
vapor
ion
liquid
24
Which of the following is a colorless gas with a pungent odor composed of hydrogen and nitrogen?
ammonia
glycerin
silicone
alkanolamine
25
A reducing agent is a substance that adds _____ to a chemical compound or subtracts oxygen from the compound.
potassium
nitrogen
carbon
hydrogen
26
In an oxidation-reduction reaction:
oxidation occurs before reduction
reduction occurs before oxidation
oxidation and reduction occur simultaneously
neither oxidation nor reduction occurs
27
Which of the following, also called a base, is a compound that reacts with acids to form salts?
anion
alkali
cation
emulsifier
28
There are _____ naturally occurring elements.
78
118
113
98
29
A chemical combination of two or more atoms of different elements in definite proportions is a(n):
compound
element
elemental molecule
ion
30
Volatile organic compounds contain _____ and evaporate very easily.
hydrogen
oxygen
nitrogen
carbon
31
Only products that contain _____ can have a pH.
carbon
potassium
silicon
water
32
The rapid oxidation of a substance, accompanied by the production of heat and light, is called:
emulsification
reduction
combustion
ionization
33
A chemical combination of matter in definite (fixed) proportions is called a(n):
emulsion
compound
pure substance
physical mixture
34
A(n) _____ is a substance that dissolves another substance to form a solution.
solute
emulsifier
solvent
element
35
A(n) _____ is the basic unit of matter.
proton
atom
cell
molecule
36
Which of the following is an oily substance used as moisturizer in skin and body creams?
silicone
glycerin
alkanolamine
ammonia
37
Substances lacking the element _____ are classified as inorganic
hydrogen
silicon
carbon
oxygen
38
The term
pH
represents the quantity of _____ ions.
nitrogen
hydrogen
carbon
oxygen
39
An atom or molecule that carries any electrical charge is called a(n):
ion
cation
anion
alkali
40
A water-in-oil emulsion:
has oil droplets emulsified in water
does not feel greasy
has water droplets emulsified in oil
is a type of powder
41
Pure water has a pH of:
10
0
7
5
42
Characteristics of matter that do not involve chemically changing a substance are called _____ properties.
static
primary
chemical
physical
43
If two liquids are mutually soluble, they are considered:
immiscible
pure
miscible
suspensions
44
The study of substances that contain carbon is called _____ chemistry.
natural
inorganic
organic
structural
45
A(n) _____ is an unstable physical mixture of undissolved particles in a liquid.
solution
solvent
emulsion
suspension
46
Rubbing alcohol and hair spray are examples of:
alkanolamines
ammonias
volatile alcohols
silicones
47
Which statement about surfactant molecules is correct?
The head is lipophilic and the tail is hydrophilic.
The head and tail are both lipophilic.
The head and tail are both hydrophilic
The head is hydrophilic and the tail is lipophilic.
48
A(n) _____ is an alkaline substance used to neutralize acids or raise the pH of hair products.
silicone
volatile alcohol
alkanolamine
glycerin
49
Protons are subatomic particles with which type of charge?
sometimes positive, sometimes negative
positive
neutral
negative
50
When acids and alkalis are mixed together in equal proportions, they form:
carbon
water
nitrogen
salt