AnswersS1S Chemistry B E4912 - AGUnit Test

Unit Test — Unit test Answers

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Which property is characteristic of alkenes, alkynes, and aromatic hydrocarbons?

A
Their vapor pressures decrease as their size increases.
B
Their pH values are greater than 7.
C
They are insoluble in water.
D
They are soluble in water.
22
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Which of the following best describes a possible carbon compound?

A
One carbon atom forms a quadruple bond with another carbon atom.
B
One carbon atom forms a double bond with an oxygen atom and two single bonds with two hydrogen atoms.
C
One carbon atom forms five single bonds with five hydrogen atoms.
D
One carbon atom forms a triple bond with another carbon atom and a double bond with an oxygen atom.
23

Which of these compounds would most likely be found in a deposit of natural gas?

A
CH4
B
CH3OH
C
CH3CH2CH2CH2CH2CH2CH2CH3
D
CH3CH2CH2CH2CH2CH2CH2CH2OH
24

Which is composed of aromatic hydrocarbons?

A
clothing
B
barbeque fuel
C
pain relievers
D
polyvinyl chloride
25

Which class of organic compound is most likely to be used in anesthetics?

A
ether
B
ester
C
alkyl halide
D
carboxylic acid
26

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27

Acetic acid, an organic compound, has the following structural formula.What is the chemical formula for acetic acid?

Question illustration
A
CHO
B
C2H4O2
C
C2OH
D
C2O2H
28

Trevor watches as a freight train passes. He counts eight identical black railroad cars, then a red car, followed by several more black cars. Which type of organic compound does the train most closely model?

A
an alkyl halide
B
an aldehyde
C
an ether
D
a carboxylic acid
29

The molecular formula for methanol is CH3OH. Which model shows methanol? (black = carbon; red = oxygen; white = hydrogen)

A
mc022-1.jpg
Option A
B
A space-filling model has a black atom with three white atoms bonded to a red atom with one white atom.
Option B
C
A ball and stick model has 2 black atoms bonded to each other. One has three white atoms bonded to it; the other has two white atoms, and a red atom bonded to a white atom.
Option C
D
A central red atom is bonded on each side to a black atom, each of which is bonded to 3 white atoms.
Option D
30

Which activity most likely involves the direct use of saturated hydrocarbons?

A
burning natural gas
B
dissolving salt in water
C
carving stone with hammer and chisel
D
bending steel by hand
31

Which compound can be used to preserve biological specimens?

A
A central C is double bonded to an O, and single bonded to 2 H.
Option A
B
A chain, reading from left: C H 3 bonded to C, bonded to O, bonded to C H 2, bonded to C H2, bonded to C H 3. The single C near the beginning of the chain is double bonded to O.
Option B
C
C H 3 single bonded to C, which is double bonded above right to O, and below right to C H 2, which is bonded to C H 3.
Option C
D
A central C is double bonded to an O above, and single bonded to C H 3 below left and O H below right.
Option D
32

The compound below is estradiol, a hormone that triggers the development of female secondary sex characteristics. Estradiol is best described as which of the following?

Question illustration
A
an alkyne
B
an alkene
C
an alkane
D
an aromatic
33

Consider this hydrocarbon.Is this an aromatic hydrocarbon? Why or why not?

Question illustration
A
Yes, because the carbon chain is made up of single bonds.
B
Yes, because the carbon chain is ring shaped.
C
No, because the carbon chain is composed of only a single ring.
D
No, because the carbon chain has no double bonds.
34

What is the general formula for a secondary amine?

A
RNH2
B
H2NRNH2
C
RN2H
D
R2NH
35

Which class of organic compound is commonly used in perfumes?

A
amine
B
alcohol
C
ester
D
ether
36

What is the name of this hydrocarbon?

Question illustration
A
hexane
B
heptane
C
octane
D
pentane
37

What are geometric isomers?

A
compounds that have the same types of atoms arranged in different orders
B
compounds that have the same number of carbon atoms arranged in different orders
C
compounds that have the same atoms arranged in the same order, but with different three-dimensional orientations
D
compounds that have the same atoms arranged in the same order, and have the same three-dimensional orientations
38

What is a disadvantage of using a space-filling model to show a chemical compound?

A
Space-filling models provide a two-dimensional view of the molecule.
B
Space-filling models do not identify the number and type of bonds.
C
Space-filling models do not show all atoms in the molecule.
D
Space-filling models show information about composition but not structure.
39

What is the name of this hydrocarbon?

Question illustration
A
1-methylbutane
B
2-methylbutane
C
2-methylpropane
D
3-methylpropane
40

Which is composed of alkenes?

A
welding torch fuel
B
polystyrene cups
C
propane gas
D
degreaser containing hexane

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