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Semester 2 Chem Review

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Quiz on Semester 2 Chem Review, created by Kara Hauber on 24/04/2017.
Kara Hauber
Quiz by Kara Hauber, updated more than 1 year ago
Kara Hauber
Created by Kara Hauber about 7 years ago
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Resource summary

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 \[H_2\]?
Answer
  • -2
  • -1
  • 0
  • +1
  • +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.
Answer
  • 760

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.
Answer
  • True
  • False

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.
Answer
  • 10
  • 5
  • 0

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].
Answer
  • miscible

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.
Answer
  • surface area of the solute
  • amount of mass
  • perimeter of the substance
  • solubility
  • insolubility

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.) \[R1--NH_2\]
Answer
  • amine

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]
Image:
Organic Isomers (2) (image/jpeg)
Answer
  • Isomers
  • The same thing

Question 32

Question
Is the following a pair of isomers or different representations of the same thing? [blank_start]Isomers[blank_end]
Image:
Organic Isomers (3) (image/jpeg)
Answer
  • Isomers
  • The same thing

Question 33

Question
Is the following a pair of isomers or different representations of the same thing? [blank_start]The same thing[blank_end]
Image:
Organic Isomers (4) (image/jpeg)
Answer
  • The same thing
  • Isomers

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.)
Answer
  • polymer

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.
Answer
  • True
  • False

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.)
Image:
Organic Substituents (2) (image/jpeg)
Answer
  • ester

Question 38

Question
The following structure represents a(n) [blank_start]alkyne[blank_end].
Image:
Organic Substituents (3) (image/jpeg)
Answer
  • alkyne
  • alkane
  • alkene

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.
Answer
  • True
  • False

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]
Answer
  • 84
  • 210
  • 84
  • 126

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
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