Chem 103 Multiple Choice Final Exam Flashcards
A hydrocarbon with a double bond is a(n)
alkene
A hydrocarbon contains only the elements
carbon and hydrogen
An alkyne is always a carbon compound that contains a ________ bond.
triple
According to the IUPAC convention for chemical naming, which part of a hydrocarbon is selected as the main chain for a hydrocarbon chain?
the longest continuous chain, regardless of bends
Alkynes can show cis-trans isomerism.
true / false
false
Alkynes can show cis-trans isomerism.
true / false
false
According to Markovnikov’s rule, the hydrogen in HOH (water) adds to the carbon in the double bond
that has the greater number of hydrogen atoms attached
A compound that contains the ring structure of benzene is called a(n)
aromatic compound
In a cis alkene, the groups are on the same side of the double bond.
true / false
true
All alkenes show cis-trans isomerism.
true / false
false
A secondary alcohol can be easily oxidized to a carboxylic acid.
true / false
false
A phenol has an -OH group bonded to a(n)
aromatic carbon
Alcohols, ethers, and thiols contain oxygen atoms.
true / false
false
Alcohols, ethers, and phenols contain oxygen with only single bonds.
true / false
true
In the oxidation of an alcohol to a ketone, there is
a loss of hydrogen
What is the IUPAC name for CH3 - CH2 - CH2 - SH?
1-propanethiol
Hexanal would be soluble in water.
true / false
false
An acetal is formed from an aldehyde or ketone and one molecule of alcohol.
true / false
false
A hemiacetal has alkoxy and hydroxyl functional groups bonded to the same carbon.
true / false
true
Carbonyl compounds having fewer than four carbon atoms are very water soluble.
true / false
true
Propanal is more soluble than pentanal.
true / false
true
The carbonyl group gives aldehydes higher boiling points than alkanes of similar mass.
true / false
true
In the IUPAC naming system, a ketone is named by replacing the -e in the corresponding alkane name with
-one
Organic chemistry is the study of the chemistry of compounds of
carbon
The compound CH3-CH2-SH is in the organic family known as
thiols
Carbon atoms always have how many covalent bonds?
four
The common name for the compound CH3-CH2-CH2-O-CH2-CH3 is
ethyl propyl ether
In all aldehydes except formadelyde (methanal), how many hydrogen atoms is the carbonyl group bonded to?
one
The carbonyl group consists of
a carbon-oxygen double bond
During photosynthesis, carbon dioxide and water are converted to glucose and oxygen by
green plants
A monosaccharide that contains 4 carbon atoms, one of which is in an aldehyde group, is classified as a(n)
aldotetrose
A monosaccharide that consists of 5 carbon atoms, one of which is in a ketone group, is classified as a(n)
ketopentose
The product of oxidation of an aldose is a carboxylic acid.
true / false
true
In the common naming convention for carboxylic acids, what is the correct Greek letter used for the carbon adjacent to the carboxyl group?
alpha (α)
A carboxylic acid is prepared from an aldehyde by
oxidation
What kind of intermolecular bonding occurs between carboxylic acids?
hydrogen bonding
The reaction of an ester with NaOH is known as
saponification
The splitting apart of an ester in the presence of a strong acid and water is called
hydrolysis
Which group of carbohydrates cannot be hydrolyzed to give smaller molecules?
monosaccharide
What happens to water solubility as chain length decreases in carboxylic acids?
it increases
The breakdown of carbohydrates to carbon dioxide and water in the body is called
respiration
The alcohol and carboxylic acid required to form propyl ethanoate are
1-propanol and ethanoic acid
Aromatic carboxylic acid
benzoic acid
The oxidation of monosaccharides produces
sugar acids
Steroids do not contain fatty acids.
true / false
true
Unsaturated fatty acids have lower melting points than saturated fatty acids because
the cis double bonds give them an irregular shape
Bile salts are synthesized from ________.
cholesterol
Many sex hormones are steroids.
true / false
true
A polyunsaturated fatty acid contains more than one
double bond
Bile salts are stored in the ________.
gallbaldder
Synthesis of cholesterol and bile salts takes place in the
liver
One inner component of a typical cell membrane is
cholesterol
Aniline is the IUPAC approved name for aminobenzene.
true / false
true
What kind of amine can NOT form hydrogen bonds?
tertiary
Amines contain the element
nitrogen
Amides are derivatives of ________ and ________.
amines; carboxylic acids
A neurotransmitter
transmits a nerve impulse
Amines act as weak acids by accepting protons from water.
true / false
false
Amines are
bronsted-lowry bases
Denaturation of a protein
disrupts the secondary, tertiary, or quaternary structure of a protein
The α helix of the secondary structure of a protein is held together by ________ between two widely separated parts of a protein chain.
hydrogen bonds
At a pH < 5, the zwitterion for alanine (pI = 6) will have
a net positive charge
Zwitterions have an overall positive charge.
true / false
false
A chain made of more than 50 amino acids is usually referred to as a(n)
protein
Acids and bases denature a protein by disrupting
hydrophobic interactions and peptide bonds
A basic amino acid has an R group that contains
an amine group
In a typical amino acid zwitterion, the carboxylate end is
negatively charge
