Deck 4: Introduction to Organic Compounds

Question 1

What is the correct condensed structural formula for this skeletal structure?

A)CH₃(CH₂)₅CH₃
B)CH₃(CH₂)₆CH₃
C)CH₃(CH₂)₇CH₃
D)CH₃(CH₂)₈CH₃

Answer 1

CH₃(CH₂)₇CH₃

Question 2

Which one of these skeletal structures is not a cycloalkane?

A)
B)
C)
D)

Answer 2

Question 3

Which of the following structures is cyclopentane?

A)
B)
C)
D)

Answer 3

Question 4

What is the correct skeletal structure for hexane?

A)
B)
C)
D)

Question 5

How many carbon atoms are in a butane molecule?

A)₃
B)₄
C)5
D)7

Question 6

Which of these hydrocarbons could not be a cycloalkane?

A)C₃H₆
B)C₄H₈
C)C₅H₁₀
D)C₆H₁₄

Question 7

Which of these formulas corresponds to that of a straight-chain alkane?

A)C₅H₁₀
B)C₆H₁₂
C)C₅H₁₂
D)C₇H₁₄

Question 8

Which of the following is the correct condensed structural formula for octane?

A)CH₃CH₂CH₂CH₂CH₂CH₃
B)CH₃CH₂CH₂CH₂CH₂CH₂CH₃
C)CH₃CH₂CH₂CH₂CH₂CH₂CH₂CH₃
D)CH₃CH₂CH₂CH₂CH₂CH₂CH₂CH₂CH₃

Question 9

A compound that is composed of only carbon and hydrogen is known as a(n):

A)homolog
B)isomer
C)carbohydrate
D)hydrocarbon

Question 10

The compound CH₃(CH₂)₄CH₃ is called:

A)hexane
B)pentane
C)heptane
D)butane

Question 11

The compound CH₃(CH₂)₅CH₃ is called:

A)hexane
B)pentane
C)heptane
D)octane

Question 12

Which of these molecules is aromatic?

A)
B)
C)
D)

Question 13

Which of these functional groups is a thiol?

A)R-S-H
B)R-O-H
C)R-S-S-H
D)R-S-S-R'

Question 14

Which of these functional groups is a phenol?

A)
B)
C)
D)

Question 15

Which of these molecules is a tertiary amine?

A)RNH₂
B)R₂NH
C)R₃N
D)R₂NH⁺

Question 16

Which of these molecules is a ketone?

A)
B)
C)
D)

Question 17

Which of these molecules is an ester?

A)
B)
C)
D)

Question 18

Which of the following is a secondary alcohol?

A)
B)
C)
D)

Question 19

Which of the following is a primary alcohol?

A)
B)
C)
D)

Question 20

Which of the following is a tertiary alcohol?

A)
B)
C)
D)

Question 21

Which of these molecules is saturated?

A)
B)
C)
D)

Question 22

Which of these molecules is an alkyne?

A)
B)
C)
D)

Question 23

Which of the following is the structure for stearic acid?

A)CH₃(CH₂)₁₄COOH
B)CH₃(CH₂)₁₆COOH
C)CH₃(CH₂)₁₂COOH
D)CH₃(CH₂)₁₀COOH

Question 24

How many carbon atoms are in a molecule of palmitic acid?

A)12
B)14
C)16
D)18

Question 25

How many carbon atoms are in a molecule of arachidic acid?

A)16
B)18
C)20
D)22

Question 26

A molecule that has both polar and nonpolar parts is said to be:

A)an isomer
B)amphipathic
C)an enantiomer
D)hydrophobic

Question 27

What functional groups are present in the following structure?
CH₃-CC -CH₂OH

A)Alcohol and an alkene
B)A ketone and an alkyne
C)An aldehyde and a ketone
D)An alcohol and an alkyne

Question 28

The name of the following alkyl group is:

A)isobutyl
B)isopropyl
C)propyl
D)butyl

Question 29

What is the IUPAC name for the following structure?

A)Ethyl cyclohexane
B)1-chloro-2-ethyl cyclohexane
C)Chloro-ethyl cyclohexane
D)2-chloro-2-ethyl cyclohexane

Question 30

Which of the following structures is correct for 1,2-dibromo-2-methyl butane?

A)
B)
C)
D)

Question 31

What is the correct name for the following compound?

A)4-chloropentane
B)4-chlorohexane
C)2-chloropentane
D)2-chloropropane

Question 32

Which of the following is the correct structure for 2,3-dimethyl pentane?

A)
B)
C)
D)

Question 33

Which of the following is the correct structure for 1-ethylcyclopentane?

A)
B)
C)
D)

Question 34

What is the correct name for the following compound?

A)4-ethyl-2-methylhexane
B)3,5-dimethylheptane
C)2-ethyl-4-methylhexane
D)2,4-dimethylhexane

Question 35

The name of the following alkyl group is:
CH₃CH₂-

A)methyl
B)isopropyl
C)propyl
D)ethyl

Question 36

When two compounds are made up of the same number and kind of atoms, but differ in their molecular structure they are known as:

A)isotopes
B)homologs
C)isomers
D)hydrocarbons

Question 37

How many isomers are there of hexane, C₆H₁₄?

A)3
B)4
C)5
D)6

Question 38

Which of the following is a structural isomer of 2-methylbutane?

A)n-propane
B)2-methylpropane
C)n-butane
D)n-pentane

Question 39

Among the following compounds which are isomers?

A)I and II
B)I and III
C)I and IV
D)II and III

Question 40

Which of the following pairs of molecules are structural isomers of each other?

A)
B) CH₃CH₂CH₂CH₂CH₃
C)
D)

Question 41

How many stereoisomers are possible for:

A)1
B)2
C)4
D)8

Question 42

Which of these molecules is not an isomer of the others?

A)
B)
C)
D)

Question 43

Which of the following alkenes shows cis-trans isomerism?

A)1,1-difluorobutene
B)1-pentene
C)2-methyl-2-octene
D)3-octene

Question 44

What is the IUPAC name for the following structure?

A)1,2-dimethyl cyclohexane
B)trans-1,2-dimethyl cyclohexane
C)cis-1,2-dimethyl cyclohexane
D)5,6-dimethyl cyclohexane

Question 45

Which of the following is cis-2,3-dichloro-2-butene?

A)
B)
C)
D)

Question 46

Which of the following is the structure of oleic acid?

A)CH₃(CH₂)₁₂COOH
B)CH₃(CH₂)₇CH=CH(CH₂)₇COOH
C)CH₃(CH₂)₄CH=CHCH₂CH=CH(CH₂)₇COOH
D)CH₃(CH₂)₁₄COOH

Question 47

The fatty acid that contains 2 double bonds is:

A)oleic acid
B)palmitic acid
C)linoleic acid
D)stearic acid

Question 48

Which fatty acid is a saturated fatty acid?

A)Oleic acid
B)Linoleic acid
C)Arachidonic acid
D)Myristic acid

Question 49

The fatty acid that is called an omega-6 fatty acid is:

A)oleic acid
B)linoleic acid
C)linolenic acid
D)arachidonic acid

Question 50

Which of the following fatty acids is an essential fatty acid?

A)Oleic acid
B)Arachidonic acid
C)Linoleic acid
D)Stearic acid

Question 51

Which of the following molecules contains a chiral carbon?

A)
B)
C)
D)

Question 52

The fatty acid that is called an omega-3 fatty acid is:

A)oleic acid
B)linolenic acid
C)linoleic acid
D)palmitic acid

Question 53

What is the correct name for the following structure?

A)Dichlorocyclopentane
B)Cis-dichlorocyclopentane
C)1,2-dichlorocyclopentane
D)Trans-dichlorocyclopentane

Question 54

Which of the following compounds is the enantiomer of:

A)
B)
C)
D)

Question 55

How many chiral carbon atoms are in this structure?

A)4
B)3
C)5
D)6

Question 56

How many chiral carbon atoms are in this molecule?

A)0
B)2
C)3
D)4

Question 57

How many chiral carbon atoms are in this molecule?

A)0
B)1
C)2
D)3

Question 58

The condensed structural formula represented by this skeletal structure is: CH₃CH₂CH₂CH₂CH₃.

Question 59

The molecule heptane contains sixteen H atoms.

Question 60

Saturated hydrocarbons contain only single C-C bonds.

Question 61

The molecule octane contains eight carbon atoms.

Question 62

The molecule cycloheptane contains sixteen H atoms.

Question 63

The general formula for a cycloalkane is C_nH_2n+2.

Question 64

This skeletal structure represents an aromatic molecule:

Question 65

This skeletal structure represents an alkene:

Question 66

This drawing represents an aldehyde:

Question 67

An amide link contains a C=O bond.

Question 68

Acetylene is another name for ethene.

Question 69

Fatty acids are a class of lipids.

Question 70

Unsaturated fatty acids contain cis alkenes.

Question 71

?-Linoleic acid contains 20 carbon atoms.

Question 72

This molecule contains 2 chiral centers.

Question 73

This molecule contains 1 chiral center.

Question 74

This molecule does not exhibit cis-trans isomerism:

Question 75

Write the condensed structural formula for this Lewis structure:

Question 76

Write the molecular formulas for the following hydrocarbons.

A)Nonane
B)Decane
C)Cyclobutane
D)Cycloheptane
E)Octane

Question 77

Write the general formula for an alkane.

Question 78

Write the names for the following alkanes.

A)C₅H₁₀
B)C₇H₁₆
C)C₃H₈
D)C₈H₁₆

Question 79

Draw the skeletal structure for octane.

Question 80

Draw the skeletal structure for cyclobutane.