Deck 11: Introduction to Organic Chemistry

Question 1

A particular structural isomer of C₆H₁₄ is shown below. Which of the following structures represents a different structural isomer of C₆H₁₄ than the one shown above?

A)
B)
C)
D)

Answer 1

Question 2

Which of these is the systematic name for the compound represented below?

A)2-ethylbutane
B)3-methylpentene
C)3-methyl-1-pentene
D)3-methyl-1-hexene
E)2-methylhexane

Answer 2

3-methyl-1-pentene

Question 3

The two molecules represented below are examples of

A)isomers.
B)isotopes.
C)alcohols.
D)carboxylic acids.
E)unsaturated hydrocarbons.

Answer 3

isomers.

Question 4

The octane rating of gasoline refers to its

A)percentage C₈H₁₈ by volume.
B)radiation dose.
C)alcohol level.
D)ability to resist engine knocking.
E)percentage of unsaturated hydrocarbons.

Question 5

Alkanes have the general formula

A)C_nH_2n-4.
B)C_nH_2n-2.
C)C_nH_2n.
D)C_nH_2n+2.
E)C_nH_2n+4.

Question 6

The systematic name for the compound represented below is

A)4,5-diethylheptane.
B)3-propyl-4-ethylhexane.
C)3-ethyl-4-propylhexane.
D)3-methyl-4-propylheptane.
E)2-ethyl-4-propylhexane.

Question 7

The compound that has a triple bond between one pair of carbon atoms is called a/an

A)alkane.
B)chlorofluorocarbon.
C)alkyne.
D)alkene.
E)alcohol.

Question 8

The alkane with six carbon atoms is called

A)butane.
B)hexane.
C)heptane.
D)butene.
E)none of these.

Question 9

Cycloalkanes have the general formula

A)C_nH_2n-4.
B)C_nH_2n-2.
C)C_nH_2n.
D)C_nH_2n+2.
E)C_nH_2n+4.

Question 10

Unsaturated hydrocarbons

A)contain at least one double or triple carbon-carbon bond.
B)contain at least one element other than hydrogen and carbon.
C)contain the maximum number of hydrogens that can bond with the carbon atoms present.
D)cannot form structural isomers.
E)cannot undergo addition reactions.

Question 11

The formula CH₃CH₂CH₂CH=CH₂ represents

A)an alkane.
B)a cycloalkane.
C)an alkene.
D)an alkyne.
E)an aromatic compound.

Question 12

Which one of these hydrocarbon chains would have the highest octane rating?

A)
B)C-C-C-C-C-C
C)
D)

Question 13

How many structural isomers are there of C₄H₁₀?

A)4
B)6
C)2
D)8
E)10

Question 14

Which one of these hydrocarbons does not have isomers?

A)C₇H₁₆
B)C₆H₁₄
C)C₅H₁₀
D)C₄H₈
E)C₃H₈

Question 15

Alkenes have the general formula

A)C_nH_2n-4.
B)C_nH_2n-2.
C)C_nH_2n.
D)C_nH_2n+2.
E)C_nH_2n+4.

Question 16

Which of these molecules is unsaturated?

A)CH₄
B)C₂H₆
C)C₄H₆
D)C₅H₁₂
E)C₆H₁₄

Question 17

The two molecules represented below are examples of CH₃-CH₂-O-CH₂CH₃ CH₃CH₂CH₂CH₂-OH

A)geometric isomers.
B)structural isomers.
C)optical isomers.
D)stereoisomers.
E)None of these.

Question 18

Which of these pairs are geometric isomers?

A)CH₃CH₂-O-CH₂CH₃ and CH₃CH₂CH₂CH₂OH
B)
C)
D)

Question 19

Which of these species is an aromatic compound?

A)C₂H₂
B)C₆H₁₂
C)C₆H₄Br₂
D)C₅H₁₀
E)C₂H₄Br₂

Question 20

Alkynes have the general formula

A)C_nH_2n-4.
B)C_nH_2n-2.
C)C_nH_2n.
D)C_nH_2n+2.
E)C_nH_2n+4.

Question 21

Acetylene, C₂H₂, the simplest alkyne, can be prepared from "inorganic" materials. Which of these reactions is used to prepare acetylene in this way?

A)2C + H₂ $\rarr$ C₂H₂
B)C₂H₄ $\rarr$ C₂H₂ + H₂
C)2CO + 2H₂O $\rarr$ C₂H₂ + H₂O₂
D)CaC₂ + 2H₂O $\rarr$ C₂H₂ + Ca(OH)₂

Question 22

The reaction of Cl₂ with CH₄ to produce methyl chloride is an example of a/an

A)free radical reaction.
B)addition reaction.
C)reduction reaction.
D)ester hydrolysis.
E)polymerization.

Question 23

"Wood alcohol" is the common name for

A)methanol.
B)ethanol.
C)propyl alcohol.
D)ethylene.
E)acetylene.

Question 24

Esters are synthesized from two classes of organic compounds. Those two types of compounds are

A)acids and bases.
B)amines and alcohols.
C)alcohols and acids.
D)amines and alkenes.
E)alkenes and bases.

Question 25

The correct structure for 2,3,3-trimethylpentane is

A)
B)
C) (


D)

Question 26

Which choice gives the structures of the reaction products when the ester below is hydrolyzed in acid solution?

A)
B)
C)
D)

Question 27

Which one of the following functional groups is found in carboxylic acids?

A)
B)
C)
D)
E)

Question 28

Oxidation of the 2-propanol will produce a/an

A)aldehyde.
B)amine.
C)alkene.
D)ketone.
E)carboxylic acid.

Question 29

The reaction of ethylene and water yields

A)an aldehyde.
B)an ester.
C)an alcohol.
D)an ether.
E)an organic acid.

Question 30

The expected product from the addition of HCl to CH₃-CH₂-CH=CH₂ is

A)CH₃-CH₂-CH=CHCl.
B)CH₃-CH₂-CCl=CH₂.
C)CH₃-CHCl-CH=CH₂.
D)CH₃-CH₂-CH₂-CH₂Cl.
E)CH₃-CH₂-CHCl-CH₃.

Question 31

The name for the compound with the formula CH₃CH₂CH₂CH₂OH is

A)propanol.
B)propane.
C)butanol.
D)pentane.
E)pentanol.

Question 32

Which one of the following functional groups is found in alcohols?

A)
B)
C)
D)
E)

Question 33

The group of atoms that is responsible for the characteristic properties of a family of organic compounds is called a/an

A)reaction center.
B)functional group.
C)binding site.
D)enzyme.
E)polyatomic ion.

Question 34

Which is the product of the reaction of one mole of HCl with one mole of 1-butyne?

A)1-chloro-1-butene
B)1-chloro-2-butene
C)2-chloro-1-butene
D)ethyl chloride + acetylene

Question 35

Which one of the following functional groups is found in ketones?

A)
B)
C)
D)
E)

Question 36

Which type of organic compound does not contain a carbonyl group?

A)ethers
B)carboxylic acids
C)ketones
D)aldehydes
E)esters

Question 37

Which one of these choices is the formula for an aldehyde?

A)CH₃CHO
B)CH₃OCH₃
C)CH₃COCH₃
D)CH₃COOH
E)HC $\equiv$ CH

Question 38

Which of these is the systematic name for the compound represented below?

A)2,3-dibromopentane
B)1,2-dibromopentane
C)2,3-dibromopropane
D)1,2-propane dibromide
E)1,2-dibromopropane

Question 39

The reaction of an alcohol and a carboxylic acid yields

A)a hydrocarbon.
B)an ester.
C)an ether.
D)an aldehyde.
E)a ketone.

Question 40

Which one of these structures represents an ester functional group?

A)
B)
C)
D)
E)

Question 41

Name the following compound:

Question 42

The oxidation product of 1-propanol when using Cr₂O₇^2- as the oxidizing agent is acetone.

Question 43

A compound with the formula C₆H₁₂ may or may not be a saturated hydrocarbon. Explain.

Question 44

Write the formula for the alcohol and the carboxylic acid from which the following ester may be synthesized.

Question 45

Write the formula for the alcohol and the carboxylic acid from which the following ester may be synthesized.

Question 46

Name the following compound:

Question 47

Which of these statements describes a condensation reaction?

A)addition of H₂O to a double bond
B)linking an acid and an alcohol to make an ester and water
C)addition of H₂ to an alkene
D)oxidation of ethanol to acetaldehyde
E)hydrolysis of an ester

Question 48

Which functional group, when present in a compound that is allowed to stand in air, poses a danger of slowly yielding explosive peroxides?

A)ether
B)alcohol
C)carboxylic acid
D)ketone
E)unsaturated hydrocarbon

Question 49

Amines are

A)organic bases that react with water to produce ammonia.
B)organic acids that react with water to produce ammonia.
C)organic bases that react with acids to form ammonium salts.
D)organic acids that react with bases to form ammonium salts.
E)None of the above.

Question 50

Which of the following compounds are isomers of each other?
I. pentane
II. 2-methylbutane
III. 2,3-dimethylbutane
IV. 2,2-dimethylpropane
V. 1-hexene

Question 51

The reaction of hydrogen chloride gas with propene will yield 1-chloropropane as the main product.

Question 52

The molecule shown below is chiral, i.e. not superimposable on its mirror image.

Question 53

Write the formula for the alcohol and the carboxylic acid from which the following ester may be synthesized.

Question 54

The systematic name for the compound with the following structural formula is 4,5-dimethyl-2-hexene.

Question 55

Which of these reactions leads to a change in the hybridization of one or more carbon atoms?

A)free radical halogenation of an alkane
B)hydrolysis of an ester to yield an acid and an alcohol
C)substitution of an aromatic ring using a halogen
D)oxidation of an alcohol to yield a carboxylic acid
E)neutralization of an amine using a strong mineral acid

Question 56

The systematic name for the hydrocarbon with the following structural formula is 1-ethyl-2-methylbutane.

Question 57

Bromination of benzene (C₆H₆), an aromatic compound,

A)occurs by substitution rather than addition.
B)occurs by addition rather than substitution.
C)occurs more rapidly than bromination of a nonaromatic compound.
D)results in formation of 1,2,3,4,5,6-hexabromocyclohexane.
E)occurs in the absence of a catalyst.