Question :
31.Which of the following esters paired with an incorrect IUPAC : 1309668
31.Which of the following esters is paired with an incorrect IUPAC name for it?
a.
b.
c.
d.more than one correct response
e.no correct response
32.Which of the following pairings of ester common and IUPAC names is correct?
a.ethyl propionate and propyl ethanoate
b.propyl acetate and propyl ethanoate
c.ethyl butyrate and butyl ethanoate
d.more than one correct response
e.no correct response
33.Which of the following compounds is a constitutional isomer of ethyl ethanoate?
a.methyl methanoate
b.ethyl propanoate
c.butanoic acid
d.more than one correct response
e.no correct response
34.For which of the following types of carboxylic acid derivatives is the parent carboxylic acid(s) a product of the derivative’s hydrolysis?
a.acid anhydride
b.acid chloride
c.ester
d.more than one correct response
e.no correct response
35.Which of the following types of inorganic esters would contain two oxygen-carbon single bonds?
a.diphosphate monoester
b.phosphate triester
c.diphosphate diester
d.more than one correct response
e.no correct response
a) All three statements are true.
b) Two of the three statements are true.
c) Only one of the statements is true.
d) None of the statements is true.
36.Statements:
(1) The compound ethanoic acid contains two carbon atoms and two oxygen atoms.
(2) Unsubstituted short-chain monocarboxylic acids are completely miscible with water.
(3) The two reactants in an esterification reaction are a carboxylic acid and an aldehyde.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
(1) The boiling points of esters are much higher than those of corresponding carboxylic acids.
(2) The compound benzoic acid is a heterocylic compound.
(3) In linear form, the ester functional group can be represented as -COOR.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
38.Statements:
(1) The compound 4-oxobutanoic acid contains both a carboxyl group and a carbonyl group.
(2) Aldehyde oxidation is a method for preparing a carboxylic acid.
(3) Both IUPAC and common names for esters consist of two words.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
39.Statements:
(1) A carboxylic acid and its corresponding carboxylate ion differ in the number of oxygen atoms they contain.
(2) In ester hydrolysis, the carbon-oxygen double bond breaks, producing an alcohol and a carboxylic acid.
(3) The acronym PET stands for polyester(terephthalate).
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
40.Statements:
(1) Hydrogen bonding is not possible between carboxylic acid molecules.
(2) The alpha-carbon atom in a carboxylic acid is the carbon atom to which the carboxyl group is attached.
(3) Sodium butanoate and ethyl butanoate are both examples of esters.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
41.Statements:
(1) Structurally, the difference between malonic acid and succinic acid is a -CH2- grouping.
(2) A carboxylic acid salt is generally more soluble in water than the carboxylic acid from which it is obtained.
(3) Ester hydrolysis and ester saponification are “reverse” reactions of each other.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
42.Statements:
(1) “Pleasant odor” is a general characteristic of esters.
(2) Citric acid is both a tricarboxylic acid and a ketoacid.
(3) Esters and carboxylic acids with the same number of carbon atoms and the same degree of saturation are constitutional isomers.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
43.Statements:
(1) Hydrolysis of a mixed acid anhydride produces two different carboxylic acids as products.
(2) Short-chain unsubstituted monocarboxylic acids are strong acids, while their longer-chain counterparts are weak acids.
(3) The parent alcohol for the ester methyl acetate is methyl alcohol.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
44.Statements:
(1) Pyruvic acid is the keto acid.
(2) Reaction of a carboxylic acid with a thiol produces a thioester, a compound containing two carbon-sulfur single bonds.
(3) One of the products of an esterification reaction is water.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
45.Statements:
(1) Nitroglycerin is an example of a phosphate triester.
(2) In the body, aspirin is converted to salicylic acid, which is the “active” ingredient.
(3) Both ibuprofen and aspirin are propanoic acid derivatives.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
