Deck 22: Organic and Biological Molecules

Question 1

Name the following:

A)2,4-diethylpentane
B)3,5-dimethylheptane
C)secondary ethylpentane
D)2,3-dimethyl-2,3-diethylpropane
E)none of these

Answer 1

3,5-dimethylheptane

Question 2

Which of the following names is a correct one?

A)3-methyl-4-isopropylpentane
B)2-ethyl-4-tertiary-butylpentane
C)2,2,3,5-tetramethylheptane
D)t-butylethane
E)trans-1,2-dimethylethane

Answer 2

2,2,3,5-tetramethylheptane

Question 3

How many isomers of C₃H₈ are there?

A)1
B)2
C)3
D)5
E)6

Answer 3

1

Question 4

Name the following:

A)isopropane
B)methylpentane
C)methylbutane
D)n-pentane
E)dodecane

Question 5

The compound below is the carbon skeleton (minus any hydrogen atoms)of Which of these phrases could be used to describe this compound?
I.C₁₂H₂₆
II.a substituted octane
III.a compound with 3 tertiary carbons
IV.a compound with 3 secondary carbons
V.a compound with 2 isopropyl groups

A)I,II,III
B)II,III,IV
C)III,IV,V
D)II,IV,V
E)I,II,III,IV

Question 6

Which of the following pairs is incorrect?

A)ethane - C₂H₄
B)pentane - C₅H₁₂
C)hexane - C₆H₁₄
D)heptane - C₇H₁₆
E)octane - C₈H₁₈

Question 7

Which is a possible product of the chlorination of butane in the presence of light?

A)C₄H₉Cl
B)C₄H₈Cl
C)C₄H₁₀Cl₂
D)C₄H₆Cl₂
E)C₄H₉Cl₂

Question 8

Name the following:

A)n-hexane
B)isohexane
C)1,2,3-trimethylpropane
D)methyl-diethylmethane
E)3-methylpentane

Question 9

Name the following:

A)1-hexyne
B)2-ethynyl butane
C)2-ethyl-3-butyne
D)3-methyl-1-pentyne
E)3-methyl-4-pentyne

Question 10

Which of the following,upon reacting with oxygen,would form the greatest amount of carbon dioxide?

A)n-pentane
B)isopentane
C)neopentane
D)Two of the above would form equal amounts.
E)All (A-C)of the above would form equal amounts.

Question 11

Name the following:

A)1,1,1-trichloro-5-bromo-3-pentene
B)1-bromo-5,5,5-trichloro-2-pentene
C)1,1,1-trichloro-5-bromo-2-pentene
D)1,1,1-trichloro-5-bromo-3-pentyne
E)none of these

Question 12

What is the compound whose carbon skeleton (minus any hydrogen atoms)appears below?

A)2,4-diethyl-3,6-dimethylheptane
B)2,5-dimethyl-4,6-diethylheptane
C)1,4-diethyl-3,6-dimethyl-tridecane
D)5-ethyl-3,6-trimethyloctane
E)4-ethyl-2,5,6-trimethyloctane

Question 13

A student gave a molecule the following name: 2-methyl-4-t-butylpentane
However,the teacher pointed out that,although the molecule could be correctly drawn from this name,the name violates the IUPAC rules.What is the correct (IUPAC)name of the molecule?

A)2-t-butyl-4-methylpentane
B)2,2,3,5-tetramethylhexane
C)2,4,5,5-tetramethylhexane
D)1-sec-butyl-1,2,2-trimethylpentane
E)none of these

Question 14

In lecture,the professor named a molecule 4-ethylpentane.An alert student pointed out that although the correct structure could be drawn,the name did not follow systematic rules.What is the correct systematic name for the molecule?

A)2-ethylpentane
B)1-methyl-1-propylpropane
C)3-methylhexane
D)4-methylhexane
E)none of these

Question 15

A student gave a molecule the following name: 2-ethyl-3-methyl-5-isopropylhexane However,his TA pointed out that,although the molecule could be correctly drawn from this name,the name violates the systematic rules.What is the correct (systematic)name of the molecule?

A)3,4-dimethyl-6-isopropylheptane
B)2-isopropyl-4,5-dimethylheptane
C)3,4,6,7-tetramethyloctane
D)1,2-diethyl-3,6,7-trimethylheptane
E)2,3,5,6-tetramethyloctane

Question 16

Name the following:

A)n-heptane
B)2-methyl-2-ethylbutane
C)3,3-dimethylpentane
D)2,2-diethylpropane
E)none of these

Question 17

Cyclobutane has 109° bond angles like all alkanes.

Question 18

Name the following: CH₃ -CH₂ -CH₃

A)ethane
B)propane
C)butane
D)pentane
E)hexane

Question 19

Name the following: CH₃-(CH₂)₆ -CH₃

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

Question 20

Why does octane have a higher boiling point than ethane,126°C versus -89°C?

A)Octane exhibits hydrogen bonding and ethane does not.
B)Octane has a higher vapor pressure than ethane.
C)Octane contains more double bonds than ethane.
D)Octane has stronger London dispersion forces than ethane.
E)At least two of the above are correct.

Question 21

Name the following:

A)methyl alcohol
B)ethyl alcohol
C)propyl alcohol
D)isopropyl alcohol
E)butanol

Question 22

Consider the molecule trans-2-butene.Which statement is true?

A)The molecule has two $\pi$ bonds.
B)There is free rotation around every bond in the molecule.
C)Cis-2-butene is its structural isomer.
D)Carbon #2 exhibits sp² hybridization.
E)None of the above.

Question 23

How many geometric isomers can be drawn for the following compound: CH₃CH=CHCH₂CH=C(CH₃)₂

A)2
B)3
C)4
D)5
E)6

Question 24

Which of the following is known as rubbing alcohol?

A)methanol
B)ethanol
C)propanol
D)isopropanol
E)none of these

Question 25

Name the following:

A)2-chloro-3-chloro-cis-2-butene
B)2,3-dichloro-cis-2-butene
C)2,3-dichloro-trans-2-butene
D)1-chloro-1-methyl-2-chloro-propene
E)2,3-dichloro-1-methyl-propene

Question 26

Which of the following is known as wood alcohol?

A)methanol
B)ethanol
C)propanol
D)isopropanol
E)none of these

Question 27

Hydrocarbons containing a carbon-carbon triple bond are called

A)alkynes
B)alkenes
C)cyclic alkanes
D)aldehydes
E)alkanes

Question 28

How many different possible dimethylbenzenes exist?

A)2
B)3
C)4
D)5
E)6

Question 29

One of the ingredients on a margarine container is listed as "polyunsaturated corn oil." This means that:

A)All the carbon bonds in the oil are single bonds.
B)Many of the polymer bonds are unsaturated.
C)All the carbon-carbon bonds are triple bonds.
D)Many of the carbon-carbon bonds are multiple bonds.
E)None of these.

Question 30

Mothballs contain what aromatic hydrocarbon?

A)naphthalene
B)benzene
C)anthracene
D)phenanthrene
E)toluene

Question 31

How many isomers are there of "dichloroethene"?

A)2
B)3
C)4
D)5
E)6

Question 32

Which of the following compounds can exhibit geometrical isomerism?

A)
B)
C)
D)
E)

Question 33

Chemical reactions involving alkanes in which hydrogen atoms are removed and the product is an unsaturated hydrocarbon are called

A)combustion reactions
B)dehydrogenation reactions
C)substitution reactions
D)addition reactions
E)polymerization reactions

Question 34

Which of the following is not a structural isomer of 1-pentene?

A)2-pentene
B)2-methyl-2-butene
C)cyclopentane
D)3-methyl-1-butene
E)1-methyl-cyclobutene

Question 35

Consider the following four compounds: Which are the same molecule?

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

Question 36

What is the most characteristic reaction of benzene?

A)oxidation
B)reduction
C)substitution
D)addition
E)addition and elimination

Question 37

Propane undergoes dehydrogenation.The product of this is

A)1-propene
B)2-propene
C)cis-1-propene
D)trans-1-propene
E)cis-2-propene

Question 38

What is the compound represented by the following structure?

A)cyclohexene,C₆H₁₀
B)cyclohexane,C₆H₁₂
C)cyclohexatriene,C₆H₉
D)cyclohexatriene,C₆H₁₂
E)benzene,C₆H₆

Question 39

How many structural and geometrical isomers are there of chloropropene?

A)2
B)3
C)4
D)5
E)more than 5

Question 40

CH₃C $\equiv$ CCH₂CH₂Cl is named:

A)1-chloro-3-pentyne
B)5-chloro-2-pentene
C)1-acetylenyl-3-chloropropane
D)5-chloro-2-pentyne
E)1-chloro-3-pentene

Question 41

Classify the following molecule:

A)acid
B)aldehyde
C)amine
D)ketone
E)carbonyl

Question 42

Which of the following will yield a carboxylic acid upon oxidation?

A)a secondary alcohol
B)an aldehyde
C)a cycloalkane
D)a ketone
E)tertiary alcohol

Question 43

What alcohols have the greatest commercial value?

A)methanol and ethanol
B)methanol and phenol
C)ethanol and phenol
D)1-propanol and ethanol
E)1-propanol and methanol

Question 44

Which molecule is an ether?

A)
B)CH₃CH₂OCH₃
C)
D)CH₃CH₂NH₂
E)none of these

Question 45

Which of the following is found in beverages such as wine?

A)methanol
B)ethanol
C)propanol
D)isopropanol
E)none of these

Question 46

Which of the following becomes more soluble in water upon addition of NaOH?

A)an amine
B)a carboxylic acid
C)an aromatic hydrocarbon
D)an alkane
E)two of these

Question 47

Oxidation of a primary alcohol results in a(n)__________ and oxidation of a secondary alcohol results in a(n)_________.

A)carboxylic acid,amine
B)aldehyde,ketone
C)ester,ether
D)ketone,aldehyde
E)amine,carboxylic acid

Question 48

Classify the following molecule:

A)primary alcohol
B)secondary alcohol
C)tertiary alcohol
D)ether
E)phenol

Question 49

Classify the following molecule:

A)acid
B)aldehyde
C)amine
D)ketone
E)carbonyl

Question 50

Identify the type of organic compound shown:

A)aldehyde
B)ester
C)amine
D)alcohol
E)none of these

Question 51

Which of the following yields a primary alcohol upon reduction?

A)a ketone
B)an alkene
C)an amine
D)an aldehyde
E)an ether

Question 52

Which of the following has only one single C-O bond?

A)ketone
B)alcohol
C)ether
D)ester
E)aldehyde

Question 53

Identify the functional group present in the following organic compound:

A)ester
B)aldehyde
C)ether
D)ketone
E)none of these

Question 54

Which molecule is a ketone?

A)
B)CH₃CH₂OCH₃
C)
D)CH₃CH₂NH₂
E)none of these

Question 55

When C₄H₈ is treated with water and H₂SO_4, a tertiary alcohol is produced.Which of the following structures could represent C₄H₈ in this reaction?

A)CH₃CH=CHCH₃
B)CH₃CH₂CH=CH₂
C)
D)CH₃CH₂CH₂CH₃
E)none of these

Question 56

Name the following:

A)2-chloro-3-ethyl-1-isopropylbutanone
B)isopropyl-chloro,methylbutyl ketone
C)2-butyl,chloro,isobutanoyl methane
D)4-chloro-2,5-dimethyl-3-heptanone
E)3-methyl-4-chloro-1-isopropylpentanone

Question 57

The boiling point of methanol is much higher than that of ethane.This is primarily due to

A)the difference in molar masses of methanol and ethane
B)the hydrogen bonding in methanol
C)the significant molecular size difference between methanol and ethane
D)the carbon oxygen double bond in the methanol
E)none of these

Question 58

When the following organic compound is oxidized,what is the major organic product?

A)3-pentanoic acid
B)3-pentanol
C)3-pentanone
D)3-pentanal
E)No reaction takes place.

Question 59

Name the following:

A)acetone
B)butyraldehyde
C)diethylketone
D)diethyl ether
E)none of these

Question 60

Identify the type of organic compound shown:

A)aldehyde
B)ester
C)amine
D)ketone
E)none of these

Question 61

Which of the following functional groups does not contain a doubly bonded oxygen (C=O)?

A)Aldehyde.
B)Carboxyl.
C)Ketone.
D)Carboxylic acid.
E)All contain a double bond.

Question 62

Identify the secondary amine.

A)CH₃NH₂
B)(CH₃)₂NH
C)
D)NH₃
E)(CH₃)₃N

Question 63

Identify the type of organic compound shown: (CH₃)₃N

A)aldehyde
B)ester
C)amine
D)ketone
E)none of these

Question 64

Name the following:

A)n-propyl acetate
B)isopropyl formate
C)isopropyl acetate
D)ethyl propanoate
E)none of these

Question 65

Referring to the structures below,which statement is true? I. II. III.

A)I and II have different molecular formulas.
B)I and III are structural isomers of each other.
C)II and III are stereoisomers of each other.
D)II and III are different conformations of the same compound.
E)I and III are the same compound.

Question 66

If you were to heat pentanoic acid and 2-butanol with a catalytic amount of strong acid,you would most likely discover in your flask:

A)a ketone
B)an ester
C)an amine
D)an alkane
E)an aldehyde

Question 67

H₂CCHCH₂N(CH₃)₂ is

A)an alkyne and a secondary amine
B)an alkene and a primary amine
C)an alkene and a tertiary amine
D)an alkyne and a tertiary amine
E)none of these

Question 68

Identify the type of organic compound shown:

A)aldehyde
B)ester
C)amine
D)ketone
E)none of these

Question 69

For which of the following compound(s)are cis and trans isomers possible?

A)2,3-dimethyl-2-butene
B)3-methyl-2-pentene
C)4,4-dimethylcyclohexanol
D)ortho-chlorotoluene
E)All can exhibit cis/trans isomers.

Question 70

Classify the following molecule:

A)primary amine
B)secondary amine
C)tertiary amine
D)amino acid
E)peptide

Question 71

What organic molecules have the general formula RCOOH?

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

Question 72

Which of the following has a double C-O bond and a single C-O bond?

A)ketone
B)ester
C)alcohol
D)amide
E)ether

Question 73

What is the common name for acetylsalicylic acid?

A)orange juice
B)aspirin
C)acetone
D)bananas
E)vinegar

Question 74

Aspirin is formed via a(n)__________ reaction.

A)combustion
B)hydrogenation
C)addition
D)condensation
E)substitution

Question 75

What organic compounds often have pleasant fruity odors?

A)ethers
B)alkynes
C)carboxylic acids
D)esters
E)amines

Question 76

A carboxylic acid will react with an alcohol to form a(n)__________ and a water molecule.

A)ester
B)amine
C)polymer
D)ketone
E)aldehyde

Question 77

Which molecule is an amine?

A)
B)CH₃CH₂OCH₃
C)
D)CH₃CH₂NH₂
E)none of these

Question 78

Which of the following types of compounds must have an sp²-hybridized carbon center?

A)cyclic ethers
B)aldehydes
C)alcohols
D)alkynes
E)amines

Question 79

Which of the following has an optical isomer?

A)
B)
C)
D)
E)none of these

Question 80

Which molecule is an ester?

A)
B)CH₃CH₂OCH₃
C)
D)CH₃CH₂NH₂
E)none of these