AnswersEO Chemistry 7320CUnit Test

Unit Test — Unit test Answers

25 verified answers
1
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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
2
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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
3

What is the general formula for a secondary amine?

A
RNH2
B
H2NRNH2
C
RN2H
D
R2NH
4

Which reaction should be used to convert propene into an alkyl halide?

A
addition
B
condensation
C
elimination
D
substitution
5

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
6

Which molecule has a structure that is most like aspirin?

A
propene
B
octyne
C
benzene
D
butane
7

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
8

How is addition polymerization different from condensation polymerization?

A
During condensation polymerization, all the atoms in the monomer units are retained in the polymer; addition polymerization results in the loss of a small molecule, such as water.
B
During addition polymerization, all the atoms in the monomer units are retained in the polymer; condensation polymerization results in the loss of a small molecule, such as water.
C
During addition polymerization, the chain grows in one direction only; during condensation polymerization, the chain can grow in multiple directions.
D
During condensation polymerization, the chain grows in one direction only; during addition polymerization, the chain can grow in multiple directions.
9

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
10

What is the name of this hydrocarbon?

Question illustration
A
hexane
B
heptane
C
octane
D
pentane
11

Which is a characteristic of condensation polymerization?

A
Monomers are generally alkenes.
B
The reaction rarely produces a product.
C
Each monomer has more than one functional group.
D
The polymer contains all the atoms in the monomer units.
12

What is the name of this hydrocarbon?

Question illustration
A
1-methylbutane
B
2-methylbutane
C
2-methylpropane
D
3-methylpropane
13

What is the name of the hydrocarbon CH3(CH2)6CH3?

A
butane
B
decane
C
octane
D
propane
14

Which is composed of alkenes?

A
welding torch fuel
B
polystyrene cups
C
propane gas
D
degreaser containing hexane
15

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
16

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.
17

What would a substance that could undergo condensation polymerization most likely have?

A
two double bonds
B
a triple bond
C
two aldehyde functional groups
D
two alcohol functional groups
18

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.
19

Which class of organic compound is commonly used in perfumes?

A
amine
B
alcohol
C
ester
D
ether
20

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

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