) Which functional group contains a carbonyl group and a hydroxyl group bonded to the same carbon atom?
A) aldehyde
B) amide
C) carboxylic acid
D) ester
E) ketone - Answer-C) carboxylic acid
Which functional group contains a carbonyl group and an ether linkage bonded to the same carbon atom...
CHM TEST BANK EXAM GUIDE
QUESTIONS AND ANSWERS
) Which functional group contains a carbonyl group and a hydroxyl group bonded to the
same carbon atom?
A) aldehyde
B) amide
C) carboxylic acid
D) ester
E) ketone - Answer-C) carboxylic acid
Which functional group contains a carbonyl group and an ether linkage bonded to the
same carbon atom?
A) aldehyde
B) amide
C) carboxylic acid
D) ester
E) ketone - Answer-D) ester
The similarities in properties of carboxylic acids, esters, and amides can best be
explained by
A) their polarity and structural similarities.
B) their similarities in molar mass.
C) hydrogen bonding.
D) the ease with which they form ions.
E) none of these. - Answer-A) their polarity and structural similarities.
The most common reactions of carboxylic acids or their derivatives involve
A) addition across the double bond between carbon and oxygen.
B) replacement of the oxygen atom in the carbonyl group.
C) replacement of the group bonded to the carbonyl atom.
D) oxidation of the R group.
E) reduction of the R group. - Answer-C) replacement of the group bonded to the
carbonyl atom.
All of the statements concerning citric acid are true except
A) it contains three carboxylic acid groups because its carbon skeleton is branched.
B) it is very soluble in water.
C) its salts are used in many consumer products.
D) it is produced only by plants.
E) it is a weak acid. - Answer-D) it is produced only by plants.
11) Which of the following bonds is not present in a carboxylic acid functional group?
A) C=C
,B) C=O
C) C-O
D) O-H
E) none of the above - Answer-A) C=C
The pleasant, characteristic odor of fruit flavorings is often associated with the presence
of
A) esters
B) carboxylic acids
C) carboxylate salts
D) ketones - Answer-A) esters
Which compound is a carboxylic acid?
A) CH3COO-K+
B) CH3COOH
C) (CH3)2CHOOCH3
D) (CH3CO)2O
E) (CH3)2O - Answer-B) CH3COOH
All of the statements about carboxylic acids are true except
A) they undergo substitution reactions involving the -OH group.
B) at low molecular weights they are liquids with sharp stinging odors.
C) they form hydrogen bonds, causing their boiling points to be higher than expected on
the basis of molecular weight.
D) they react with bases to form salts which are often more soluble than the original
acid.
E) when they behave as acids, the -OH group is lost leaving the CO- ion. - Answer-E)
when they behave as acids, the -OH group is lost leaving the CO- ion.
Which acid would be expected to have the lowest boiling point?
A) acetic, CH3CO2H
B) benzoic, C6H5CO2H
C) formic, HCO2H
D) oxalic, (CO2H)2
E) stearic, CH3(CH2)16CO2H - Answer-C) formic, HCO2H
Which acid would be expected to have the highest boiling point?
A) acetic, CH3CO2H
B) benzoic, C6H5CO2H
C) formic, HCO2H
D) oxalic, (CO2H)2
E) stearic, CH3(CH2)16 CO2H - Answer-E) stearic, CH3(CH2)16 CO2H
Which of the following has the highest boiling point?
A) ethane, CH3CH3
B) dimethyl ketone, CH3COCH3
An acyl group is a group in which
A) an amine and a carbonyl are bonded to the same carbon atom.
B) a hydroxyl and an alkene are bonded to the same carbon atom.
C) an alpha carbon is bonded to an alkyl group.
D) an alkyl group is bonded to a carbonyl carbon atom.
E) an acidic group is bonded to an aromatic group. - Answer-D) an alkyl group is
bonded to a carbonyl carbon atom.
Which acid would be expected to have the lowest boiling point?
A) acetic
B) benzoic
C) formic
D) oxalic
E) stearic - Answer-C) formic
Which acid would be expected to have the highest boiling point?
A) acetic
B) benzoic
C) formic
D) oxalic
E) stearic - Answer-E) stearic
What is the IUPAC name of the compound shown?
CH3CH2COOCH3
A) 2-butanoic acid
B) 3-butanoic acid
C) methyl ethanoate
D) propyl methanoate
E) methyl propanoate - Answer-E) methyl propanoate
An alpha hydroxy carboxylic acid has an additional -OH group attached to the molecule
at which location?
A) the carbonyl carbon atom
B) the #2 carbon atom
C) the carbon atom farthest from the carboxyl group
D) the carbon atom that contains the amine group
E) none of the above - Answer-B) the #2 carbon atom
Carboxylic acids generally taste ________.
A) sour
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