Question : 31.Hydrogenation, with a catalyst, of which of the following compounds : 1309662

 

 

31.Hydrogenation, with a catalyst, of which of the following compounds would produce a four-carbon alcohol?

a.butanal

b.2-butanone

c.diethylketone

d.more than one correct response

e.no correct response

 

 

 

32.In which of the following pairings of compound types does the first listed compound type contain more alkoxy groups than the second listed compound type?

a.acetal, hemiacetal

b.hemiacetal, acetal

c.aldehyde, hemiacetal

d.more than one correct response

e.no correct response

 

 

 

33.Which of the following is a product of the acid hydrolysis of the following compound?

a.methyl alcohol

b.ethyl alcohol

c.propanone

d.more than one correct response

e.no correct response

 

 

 

34.Which of the following types of compounds contains a carbon-sulfur double bond?

a.a thial (thioaldehyde)

b.a thione (thioketone)

c.a sulfoxide

d.more than one correct response

e.no correct response

 

 

 

35.Which of the following compounds would be named as a ketone?

a.

b.

c.

d.more than one correct response

e.no correct response

 

 

 

Use the following to answer the questions below:

 

In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:

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) Cyclic hemiacetals are usually more stable than noncyclic hemiacetals.

(2) A carbonyl group consists of a carbon atom and an oxygen atom joined by a double bond.

(3) The compound benzaldehyde contain six carbon atoms.

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.

 

 

 

37.Statements:

(1) The simplest aldehyde is formaldehyde, and the simplest ketone is acetone.

(2) Carbonyl group polarity makes dipole-dipole interactions between like aldehyde molecules or like ketone molecules possible.

(3) Reaction of a hemiacetal with an alcohol produces an acetal.

 

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) Aldehydes and ketones readily undergo oxidation to carboxylic acids.

(2) Propanone and dimethyl ketone are two names for the same compound.

(3) The “silver mirror test” distinguishes between aldehydes and ketones.

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) Acetals contain three oxygen atoms, and hemiacetals contain two oxygen atoms.

(2) Reduction of an aldehyde, using hydrogen gas, produces a primary alcohol.

(3) In an aldehyde, the carbonyl group can be located on either carbon 1 or carbon 2.

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) In a “dial” two aldehyde groups are present.

(2) Formaldehyde readily participates in polymer formation.

(3) Primary alcohol oxidation is a method for producing ketones.

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) Butanal and 2-butanone are constitutional isomers.

(2) The linear notation for an aldehyde is RCOH and that for a ketone is RCOR.

(3) Water molecules can hydrogen bond with aldehyde and ketone molecules.

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) The compound 4-oxopentanal contains both an aldehyde and an ether functional group.

(2) An alkoxy group and a hydroxy group attached to the same carbon atom are present in both hemiacetals and acetals.

(3) Cyclic aldehyde structures are possible but cyclic ketone structures are not possible.

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) Butanal and butanone are both correct IUPAC names.

(2) The two alcohol molecules produced when an acetal molecule undergoes hydrolysis are always identical.

(3) Aldehydes and ketones are both classified as carbonyl-containing compounds.

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) In the IUPAC nomenclature system, an aldehyde group has priority over a ketone group.

(2) Addition of an alcohol molecule across the carbon-oxygen double bond of an aldehyde produces a compound in which the carbonyl carbon atom bears both an alkoxy group and a hydroxy group.

(3) 2-propenal contains two fewer hydrogen atoms than propionaldehyde.

 

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) The lachrymator in wood smoke is formaldehyde.

(2) The skin pigment melanin is a polymeric substance containing many interconnected aldehyde units.

(3) Benedict’s test can be used to detect glucose in urine (diabetes) because glucose contains an aldehyde group.

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.

 

 

 

 

 

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