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Chemistry
Chemistry
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1
One end of a surfactant molecule is hydrophilic and the other end is
lipophilic
all answers
dissolves in oil
oil loving tail
2
The skin's protective barrier against microorganisms
acid mantle
alkaline mantle
acid alkaline barrier
sebum barrier
3
Which of these will tend to separate over time?
surfactants and emusifiers
suspensions and emulsions
solutions
emulsions and solutions
4
What can result if the skin is exposed to a low or high pH?
renewed skin
cell turnover
inflammation
softening of the skin
5
What contains 2 or more atoms of the same element united chemically
compounds
compound particles
elemental molecules
H2O
6
Atoms consists of
neutrons and electrons
all answers
electrons
protons and neutrons
7
A configuration of elements showing their atomic number and chemical properties
states of matter
pH scale
logarithmic scale
periodic table of elements
8
Matter is any substance that occupies space and has
mass
electricity
energy
no physical properties
9
A solute is the dissolved substance in a solution
False
True
10
Alkalis __________________
all answers
also known as bases
turn litmus paper from red to blue
taste bitter
11
What is a solution
2 or more miscible substances
H2O2
salt water
all answers
12
The lightest element on earth is
carbom
hydrogen
nitrogen
oxygen
13
Water makes up______of the human body.
35%
15%
98%
65%
14
The pH scale defines_____
acidity and alkalinity of a substance
combustion ability
atomic weight
helium potential
15
Which of these is an example of an organic substance?
gasoline
all of the above
fertilizer
plastics
16
When water becomes ice it undergoes a
no answers
change in chemical properties
chemical change
physical change
17
The most abundant element found on earth is
oxygen
water
nitrogen
hydrogen
18
Organic chemistry will
not burn
burn
contain minerals
contain metals
19
A chemical change is the change in chemical composition of a substance without creating a new substance
False
True
20
A pH of 10 is _____more alkaline than a pH of 7
10 times
1000 times
100 times
7 times
21
Oxidation is a chemical reaction that combines a substance with O2 to produce an oxide
False
True
22
Hydrogen peroxide is a chemical compound of hydrogen and ______
nitrogen
peroxide
hydroxides
oxygen
23
Rusting iron is a change in
physical characteristics
shape
weight
chemical properties
24
All living things whether plant or animal contain
oxygen
helium
nitrogen
carbon
25
This is an example of a suspension
hairspray
suntan lotion
all answers
moisturizing lotion
26
The two type of chemical reactions important to estheticians
oxidation reduction and acid alkali neutralization
redox and acid exfoliation
combustion and oxidation
acid alkali neutralization and combustion
27
Liquids
have a definite volume
have a definite shape
answers 1 and 3 are correct
have a definite size
28
Water is a universal _______
solute
solution
surfactant
solvent
29
Ozone is an elemental molecule
False
True
30
The rapid oxidation of a substance accompanied by heat and light
redox
reduction
combustion
inflammation
31
Carbon Dioxide, CO2, is a compound.
False
True
32
Anything below 7 on the pH scale is considered
neutral
alkaline
acidic
less effective
33
Air is made of a
mixture of gases
only oxygen
H2O2
carbon
34
How do antioxidants prevent oxidation from occurring?
addition of oxygen to a substance
reducing oxygen
they can't stop it once it's begun
neutralize free radicals
35
2 or more substances united that need the aid of an emulsifier to form an emulsion are said to be
mixable
gaseous
miscible
immiscible
36
What are the smallest particles from which all matter is composed
electrons
compounds
molecules
atoms
