Question 1
Question
The separate oxidation and reduction equations are called [blank_start]half-reactions[blank_end].
Answer
-
half-reactions
-
oxidation
-
reduction
-
oxidized
-
reduced
-
nuclear
-
pure elements
-
solution
-
double displacement
Question 2
Question
Electrons are [blank_start]rarely[blank_end] found unattached to atoms. Thus, for one element or compound to lose electrons and be [blank_start]oxidized[blank_end], another element or compound must be there to gain the electrons and be [blank_start]reduced[blank_end]. In other words, [blank_start]oxidation[blank_end] (loss of electrons) must be accompanied by [blank_start]reduction[blank_end] (gain of electrons).
Answer
-
rarely
-
oxidized
-
reduced
-
reduction
-
oxidation
-
oxidized
-
rarely
-
reduced
-
oxidation
-
reduction
-
reduced
-
rarely
-
oxidized
-
oxidation
-
reduction
-
oxidation
-
rarely
-
oxidized
-
reduced
-
reduction
-
reduction
-
rarely
-
oxidized
-
reduced
-
oxidation
Question 3
Question
In single-displacement reactions, atoms of one element in a compound are displaced (or replaced) by atoms from a(n) [blank_start]pure element[blank_end].
Answer
-
pure element
-
half-reactions
-
rarely
-
oxidized
-
reduced
-
oxidation
-
reducation
-
nuclear
-
solution
-
double displacement
Question 4
Question
What is the oxidation number for H in \[H_2\]?
Question 5
Question
Classify the following reaction:
\[Zn(C_2H_3O_2)_2(aq) + Na_2S(aq) --> ZnS(s) + 2 NaC_2H_3O_2(aq)\]
Answer
-
Single Displacement
-
Double Displacement
-
Combination/Synthesis
-
Decomposition
-
Acid/Base
-
Combustion
Question 6
Question
Another factor that affects the actual yield is a reaction's rate. Sometimes a reaction is so [blank_start]slow[blank_end] that it has not reached the maximum yield by the time the product is isolated.
Answer
-
slow
-
fast
-
equilibrium
-
reversible
-
solute
-
solvent
Question 7
Question
If a calculation calls for you to convert from an amount of one substance in a given chemical reaction to the corresponding amount of another substance participating in the same reaction, it is an equation [blank_start]stoichiometry[blank_end] problem.
Answer
-
stoichiometry
-
slow
-
fast
-
reversible
-
equilibrium
-
solute
-
solvent
-
solution
Question 8
Question
Molarity (abbreviated M) is defined as moles of [blank_start]solute[blank_end] per liter of [blank_start]solution[blank_end].
Answer
-
solute
-
solvent
-
solution
-
slow
-
fast
-
stochiometry
-
reversible
-
solution
-
solute
-
solvent
-
stoichiometry
-
slow
-
fast
-
reversible
Question 9
Question
There are many reasons why the actual yield in a reaction might be less than the theoretical yield. One key reason is that many chemical reactions are significantly [blank_start]reversible[blank_end].
Answer
-
reversible
-
fast
-
slow
-
equilibrium
-
forward
-
solute
-
solvent
-
solution
-
stoichiometric
Question 10
Question
Even if 100% of the limiting reactant proceeds to products, usually the product still needs to be [blank_start]separated[blank_end] from the other components in the product mixture (excess reactants, products of side reactions, and other impurities). This process generally leads to some loss of product.
Answer
-
separated
-
reversible
-
added
-
equilibrium
-
slow
-
fast
Question 11
Question
The particles in a gas are constantly colliding with the walls of the container and with each other. Because of these collisions, the gas particles are constantly changing their direction of [blank_start]motion[blank_end] and their [blank_start]velocity[blank_end].
Answer
-
motion
-
velocity
-
force
-
acceleration
-
solute
-
solvent
-
molarity
-
point-masses
-
velocity
-
motion
-
force
-
acceleration
-
point-masses
-
solute
-
solvent
Question 12
Question
Each time a gas particle collides with and ricochets off one of the walls of its container, it exerts a(n) [blank_start]force[blank_end] against the wall. The sum of the forces of these ongoing collisions of gas particles against all the container's interior walls creates a continuous pressure upon those walls.
Answer
-
force
-
pressure
-
motion
-
velocity
-
acceleration
-
separate
-
point-masses
Question 13
Question
The particles of an ideal gas are assumed to be [blank_start]point-masses[blank_end], that is, particles that have a mass but occupy no volume.
Answer
-
point-masses
-
force
-
motion
-
velocity
-
acceleration
-
pressure
-
pure elements
Question 14
Question
There are [blank_start]760[blank_end] mmHg per atm.
Question 15
Question
If the difference in electronegativity between two atoms is greater than 1.7, we expect the bond between them to be [blank_start]ionic[blank_end].
Answer
-
ionic
-
nonpolar covalent
-
polar covalent
-
metallic
Question 16
Question
Weaker attractions between particles lead to a(n) [blank_start]higher[blank_end] rate of evaporation.
Answer
-
higher
-
lower
-
limited
-
attract
-
repel
-
separate
Question 17
Question
The higher an element's electronegativity, the greater its ability to [blank_start]attract[blank_end] electrons from other elements.
Answer
-
attract
-
repel
-
higher
-
lower
-
separate
Question 18
Question
The temperature at which the equilibrium vapor pressure of a liquid equals 1 atmosphere is called its normal [blank_start]boiling point[blank_end].
Answer
-
boiling point
-
freezing point
-
melting point
-
deposition point
-
sublimation point
Question 19
Question
Nonpolar substances are likely to dissolve in [blank_start]nonpolar solvents[blank_end].
Answer
-
nonpolar solvents
-
polar solvents
-
soluble products
-
insoluble products
-
anions
-
cations
Question 20
Question
Decane, \[C_{10}H_{22}\], would be expected to be soluble in hexane.
Question 21
Question
Soap helps to clean a greasy dish by
Answer
-
keeping oil droplets from regrouping and returning to the surface of the dish.
-
embedding the nonpolar hydrocarbon ends of the soap anions into the nonpolar triglyceride droplets, while the anionic ends remain sticking out into the water.
-
making it so triglyceride droplets repel each other when they come close.
-
incorporating all of the above actions.
Question 22
Question
The compound decane, \[C_{10}H_{22}\], is
Answer
-
an ionic compound and therefore polar.
-
a nonpolar molecular compound.
-
a molecular compound with small polar molecules.
Question 23
Question
If more than 10 grams of a substance will dissolve in 100 milliliters (or 100 g) of solvent, the substance is considered [blank_start]soluble[blank_end].
Answer
-
soluble
-
insoluble
-
polar
-
nonpolar
-
miscible
-
organic
-
inorganic
Question 24
Question
If more than [blank_start]10[blank_end] grams of substance will dissolve in 100 milliliters (or 100 g) of solvent, the substance is considered soluble.
Question 25
Question
If we need to predict the relative water solubility of two similar molecules, we can expect the one with the proportionally [blank_start]larger[blank_end] polar portion to have higher water solubility.
Answer
-
larger
-
small
-
non
-
insoluble
-
organic
-
inorganic
Question 26
Question
Substances composed of [blank_start]small[blank_end] polar molecules are usually soluble in water.
Answer
-
small
-
larger
-
miscible
-
temperature
-
organic
-
inorganic
Question 27
Question
When two liquids mix in any proportion without any limit to their solubility, they are called [blank_start]miscible[blank_end].
Question 28
Question
The net rate of solution depends on three factors: [blank_start]surface area of the solute[blank_end], degree of agitation or stirring, and temperature.
Question 29
Question
[blank_start]amine[blank_end] have the following general structure. (Type the word that best completes this sentence. Do not type any spaces.)
\[R1--NH_2\]
Question 30
Question
Identify each of the following:
(a) glucose
[blank_start]monosaccharide[blank_end]
(b) amylopectin
[blank_start]polysaccharide[blank_end]
(c) lactose
[blank_start]disaccharide[blank_end]
Answer
-
monosaccharide
-
polysaccharide
-
disaccharide
Question 31
Question
Is the following a pair of isomers or different representations of the same thing?
[blank_start]Isomers[blank_end]
Question 32
Question
Is the following a pair of isomers or different representations of the same thing?
[blank_start]Isomers[blank_end]
Question 33
Question
Is the following a pair of isomers or different representations of the same thing?
[blank_start]The same thing[blank_end]
Question 34
Question
[blank_start]polymer[blank_end] are large molecules composed of repeating units. (Type the word that best completes this sentence. Do not type any spaces.)
Question 35
Question
The digestion of proteins begins in the stomach. The [blank_start]acidic[blank_end] conditions there weaken the links that maintain the protein molecules' tertiary structure. This process is called [blank_start]denaturation[blank_end], because the loss of tertiary structure causes a corresponding loss of the protein's "natural" function.
Answer
-
acidic
-
denaturation
-
polymer
-
ester
-
alkyne
-
small section
-
denaturation
-
acidic
-
polymer
-
ester
-
alkyne
-
small section
Question 36
Question
Starches and cellulose are polysaccharides.
Question 37
Question
An [blank_start]ester[blank_end] has the following general structure. (Type the word that best completes this sentence. Do not type any spaces.)
Question 38
Question
The following structure represents a(n) [blank_start]alkyne[blank_end].
Question 39
Question
When a(n) [blank_start]small section[blank_end] of an organic molecule is largely responsible for the molecule's chemical and physical characteristics, that section is called a functional group.
Answer
-
small section
-
large piece
-
ester
-
amine
-
acidic
-
polymer
-
denaturation
Question 40
Question
When an atom undergoes positron emission, the mass number (or nucleon number) of the resulting atom [blank_start]stays the same[blank_end].
Answer
-
stays the same
-
increases
-
decreases
Question 41
Question
Because the amount of energy [blank_start]released[blank_end] when a nucleus is formed is a reflection of the strength with which nucleons are bound, it is called the atom's binding energy.
Answer
-
released
-
gained
-
stays the same
-
increases
-
decreases
Question 42
Question
There appears to be something stable about having 2, 8, 20, 28, 50, 82, or 126 protons or neutrons. The nuclides with [blank_start]double magic numbers[blank_end] have very high stability.
Answer
-
double magic numbers
-
a single magic number
-
a decrease of 4
Question 43
Question
When an atom undergoes alpha emission, the mass number (or nucleon number) of the resulting atom [blank_start]decreases by 4[blank_end].
Answer
-
decreases by 4
-
increases by 2
-
doubles
-
triples
-
decreases by 2
-
increases by 4
Question 44
Question
It takes about [blank_start]10,000[blank_end] times as much energy to remove a proton or a neutron from the nucleus of a hydrogen-2 atom as to remove its one electron.
Answer
-
10,000
-
0
-
100
-
1000
-
100,000
Question 45
Question
[blank_start]Beta particles[blank_end] from a source outside the body can penetrate the outer layers of the skin, but they will be stopped before they reach the vital organs.
Answer
-
Beta particles
-
Alpha particles
-
Positron emmision
-
Gamma rays
-
Electron capture
Question 46
Question
Free radicals are less reactive than other molecules.
Question 47
Question
For atoms [blank_start]smaller than[blank_end] iron-56, energy is released when smaller atoms combine to form larger ones.
Answer
-
smaller than
-
larger than
-
increasing
-
decreasing
-
released
-
gained
Question 48
Question
For atoms [blank_start]larger than[blank_end] iron-56, splitting larger atoms to form more stable, smaller atoms releases energy.
Answer
-
larger than
-
smaller than
-
gains
-
loses
-
increases
-
decreases
Question 49
Question
Polonium-210 is used in radiation therapy.
(a) What is its atomic number and mass number.
atomic number [blank_start]84[blank_end]
mass number [blank_start]210[blank_end]
(b) How many protons and how many neutrons are in the nucleus of each atom?
protons [blank_start]84[blank_end]
neutrons [blank_start]126[blank_end]
Question 50
Question
Classify each of the following as organic or inorganic (not organic) compounds.
(a) hexane, \[C_6H_{14}\], in gasoline
[blank_start]organic[blank_end]
(b) water, \[H_2O\], in your body
[blank_start]inorganic[blank_end]
(c) ethyl butanoate, \[CH_3CH_2CH_2CO_2CH_2CH_3\], in a pineapple
[blank_start]also organic[blank_end]
Answer
-
organic
-
inorganic
-
also organic