Chem 103 Multiple Choice Final Exam

Question 1

A hydrocarbon with a double bond is a(n)

Answer 1

alkene

Question 2

A hydrocarbon contains only the elements

Answer 2

carbon and hydrogen

Question 3

An alkyne is always a carbon compound that contains a ________ bond.

Answer 3

triple

Question 4

According to the IUPAC convention for chemical naming, which part of a hydrocarbon is selected as the main chain for a hydrocarbon chain?

Answer 4

the longest continuous chain, regardless of bends

Question 5

Alkynes can show cis-trans isomerism.
true / false

Answer 5

false

Question 6

Alkynes can show cis-trans isomerism.
true / false

Answer 6

false

Question 7

According to Markovnikov’s rule, the hydrogen in HOH (water) adds to the carbon in the double bond

Answer 7

that has the greater number of hydrogen atoms attached

Question 8

A compound that contains the ring structure of benzene is called a(n)

Answer 8

aromatic compound

Question 9

In a cis alkene, the groups are on the same side of the double bond.
true / false

Answer 9

true

Question 10

All alkenes show cis-trans isomerism.
true / false

Answer 10

false

Question 11

A secondary alcohol can be easily oxidized to a carboxylic acid.
true / false

Answer 11

false

Question 12

A phenol has an -OH group bonded to a(n)

Answer 12

aromatic carbon

Question 13

Alcohols, ethers, and thiols contain oxygen atoms.
true / false

Answer 13

false

Question 14

Alcohols, ethers, and phenols contain oxygen with only single bonds.
true / false

Answer 14

true

Question 15

In the oxidation of an alcohol to a ketone, there is

Answer 15

a loss of hydrogen

Question 16

What is the IUPAC name for CH3 - CH2 - CH2 - SH?

Answer 16

1-propanethiol

Question 17

Hexanal would be soluble in water.
true / false

Answer 17

false

Question 18

An acetal is formed from an aldehyde or ketone and one molecule of alcohol.
true / false

Answer 18

false

Question 19

A hemiacetal has alkoxy and hydroxyl functional groups bonded to the same carbon.
true / false

Answer 19

true

Question 20

Carbonyl compounds having fewer than four carbon atoms are very water soluble.
true / false

Answer 20

true

Question 21

Propanal is more soluble than pentanal.
true / false

Answer 21

true

Question 22

The carbonyl group gives aldehydes higher boiling points than alkanes of similar mass.
true / false

Answer 22

true

Question 23

In the IUPAC naming system, a ketone is named by replacing the -e in the corresponding alkane name with

Answer 23

-one

Question 24

Organic chemistry is the study of the chemistry of compounds of

Answer 24

carbon

Question 25

The compound CH3-CH2-SH is in the organic family known as

Answer 25

thiols

Question 26

Carbon atoms always have how many covalent bonds?

Answer 26

four

Question 27

The common name for the compound CH3-CH2-CH2-O-CH2-CH3 is

Answer 27

ethyl propyl ether

Question 28

In all aldehydes except formadelyde (methanal), how many hydrogen atoms is the carbonyl group bonded to?

Answer 28

one

Question 29

The carbonyl group consists of

Answer 29

a carbon-oxygen double bond

Question 30

During photosynthesis, carbon dioxide and water are converted to glucose and oxygen by

Answer 30

green plants

Question 31

A monosaccharide that contains 4 carbon atoms, one of which is in an aldehyde group, is classified as a(n)

Answer 31

aldotetrose

Question 32

A monosaccharide that consists of 5 carbon atoms, one of which is in a ketone group, is classified as a(n)

Answer 32

ketopentose

Question 33

The product of oxidation of an aldose is a carboxylic acid. true / false

Answer 33

true

Question 34

In the common naming convention for carboxylic acids, what is the correct Greek letter used for the carbon adjacent to the carboxyl group?

Answer 34

alpha (α)

Question 35

A carboxylic acid is prepared from an aldehyde by

Answer 35

oxidation

Question 36

What kind of intermolecular bonding occurs between carboxylic acids?

Answer 36

hydrogen bonding

Question 37

The reaction of an ester with NaOH is known as

Answer 37

saponification

Question 38

The splitting apart of an ester in the presence of a strong acid and water is called

Answer 38

hydrolysis

Question 38

Which group of carbohydrates cannot be hydrolyzed to give smaller molecules?

Answer 38

monosaccharide

Question 39

What happens to water solubility as chain length decreases in carboxylic acids?

Answer 39

it increases

Question 39

The breakdown of carbohydrates to carbon dioxide and water in the body is called

Answer 39

respiration

Question 39

The alcohol and carboxylic acid required to form propyl ethanoate are

Answer 39

1-propanol and ethanoic acid

Question 39

Aromatic carboxylic acid

Answer 39

benzoic acid

Question 40

The oxidation of monosaccharides produces

Answer 40

sugar acids

Question 41

Steroids do not contain fatty acids. true / false

Answer 41

true

Question 42

Unsaturated fatty acids have lower melting points than saturated fatty acids because

Answer 42

the cis double bonds give them an irregular shape

Question 43

Bile salts are synthesized from ________.

Answer 43

cholesterol

Question 44

Many sex hormones are steroids. true / false

Answer 44

true

Question 45

A polyunsaturated fatty acid contains more than one

Answer 45

double bond

Question 46

Bile salts are stored in the ________.

Answer 46

gallbaldder

Question 47

Synthesis of cholesterol and bile salts takes place in the

Answer 47

liver

Question 48

One inner component of a typical cell membrane is

Answer 48

cholesterol

Question 48

Aniline is the IUPAC approved name for aminobenzene. true / false

Answer 48

true

Question 49

What kind of amine can NOT form hydrogen bonds?

Answer 49

tertiary

Question 50

Amines contain the element

Answer 50

nitrogen

Question 51

Amides are derivatives of ________ and ________.

Answer 51

amines; carboxylic acids

Question 52

A neurotransmitter

Answer 52

transmits a nerve impulse

Question 53

Amines act as weak acids by accepting protons from water. true / false

Answer 53

false

Question 54

Amines are

Answer 54

bronsted-lowry bases

Question 55

Denaturation of a protein

Answer 55

disrupts the secondary, tertiary, or quaternary structure of a protein

Question 56

The α helix of the secondary structure of a protein is held together by ________ between two widely separated parts of a protein chain.

Answer 56

hydrogen bonds

Question 57

At a pH < 5, the zwitterion for alanine (pI = 6) will have

Answer 57

a net positive charge

Question 58

Zwitterions have an overall positive charge. true / false

Answer 58

false

Question 58

A chain made of more than 50 amino acids is usually referred to as a(n)

Answer 58

protein

Question 59

Acids and bases denature a protein by disrupting

Answer 59

hydrophobic interactions and peptide bonds

Question 60

A basic amino acid has an R group that contains

Answer 60

an amine group

Question 61

In a typical amino acid zwitterion, the carboxylate end is

Answer 61

negatively charge