Question 1

The compound shown below is the enol form of butanal.

Accepted Answer

A) True 
 B)False

Question 2

What kind of compound is produced by the reaction of an aldehyde with an alcohol in the presence of a trace of acid?

Accepted Answer

A) ether 
B) ketone 
C) carboxylic acid 
D) hemiacetal 
E) alkyne 
A) ether 
B) ketone 
C) carboxylic acid 
D) hemiacetal 
E) alkyne

Question 3

What is the IUPAC name of the compound shown?

Accepted Answer

A) 4-octanone 
B) 1-propyl butanal 
C) 4-heptanone 
D) dipropyl ether 
E) 4-heptanal 
A) 4-octanone 
B) 1-propyl butanal 
C) 4-heptanone 
D) dipropyl ether 
E) 4-heptanal

Question 4

The compound decanal contributes to the odor and flavor of an orange.Which of the following statements about decanal is FALSE?

Accepted Answer

A) It is an aldehyde. 
B) It contains a saturated chain of ten carbons. 
C) It contains a carbonyl group on the first carbon of the carbon chain. 
D) It can form intermolecular hydrogen bonds with other molecules of decanal. 
E) It is insoluble in water. 
A) It is an aldehyde. 
B) It contains a saturated chain of ten carbons. 
C) It contains a carbonyl group on the first carbon of the carbon chain. 
D) It can form intermolecular hydrogen bonds with other molecules of decanal. 
E) It is insoluble in water.

Question 5

Propylene glycol,shown below,is a nontoxic diol used as a solvent for pharmaceutical drugs,and as a moisturizing agent for foods.When ingested,both alcohol functional groups are oxidized by enzymes in the liver to produce pyruvic acid,a compound with the formula C3H4O3.What is the structure of pyruvic acid?  $\text { enzymes } \longrightarrow \text { pyruvic acid }$

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 6

Which of the following will give a silver mirror when treated with Tollens' reagent?

Accepted Answer

A) 2-pentanone 
B) propanone 
C) hexanal 
D) 1-pentanol 
E) 2-pentanol 
A) 2-pentanone 
B) propanone 
C) hexanal 
D) 1-pentanol 
E) 2-pentanol

Question 7

What is the general formula of a ketone?

Accepted Answer

A) R-O-R 
B) R-O-H 
C) 
  
D) 
  
E) None of the choices are correct. 
A) R-O-R 
B) R-O-H 
C) 
  
D) 
  
E) None of the choices are correct.

Question 8

Small (low molecular weight)aldehyde molecules are generally more water-soluble than large ones.

Accepted Answer

A) True 
 B)False

Question 9

What is the IUPAC name of the compound shown?

Accepted Answer

A) 2-methylpropanone 
B) 2-butanal 
C) 2-butanyl 
D) butanone 
E) 2-methyl-2-propanone 
A) 2-methylpropanone 
B) 2-butanal 
C) 2-butanyl 
D) butanone 
E) 2-methyl-2-propanone

Question 10

What is the structure of the hemiacetal produced in the following reaction?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 11

Which of the statements concerning the compound shown below is FALSE?

Accepted Answer

A) Its name is cyclopentanone. 
B) Its molecular formula is C5H8O. 
C) Molecules of this compound are held together in a collection by dipole-dipole attractions. 
D) It may be formed by the oxidation of cyclopentanol. 
E) It can be oxidized to produce a carboxylic acid. 
A) Its name is cyclopentanone. 
B) Its molecular formula is C5H8O. 
C) Molecules of this compound are held together in a collection by dipole-dipole attractions. 
D) It may be formed by the oxidation of cyclopentanol. 
E) It can be oxidized to produce a carboxylic acid.

Question 12

Methanol is toxic if ingested.The toxicity is due to the aldehyde produced when methanol is oxidized in the liver.Which of the following is the aldehyde formed by the oxidation of methanol?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 13

Which of the following best describes the structure of an enol?

Accepted Answer

A) contains a triple bond and a carbonyl group 
B) contains only single bonds and a hydroxyl group 
C) contains a double bond and a hydroxyl group 
D) contains a double bond and a carbonyl group 
E) contains only single bonds and a carbonyl group 
A) contains a triple bond and a carbonyl group 
B) contains only single bonds and a hydroxyl group 
C) contains a double bond and a hydroxyl group 
D) contains a double bond and a carbonyl group 
E) contains only single bonds and a carbonyl group

Question 14

Aldehydes are easily oxidized to carboxylic acids.

Accepted Answer

A) True 
 B)False

Question 15

A ketone will react with Tollens' reagent to produce a silver mirror,but an aldehyde will not.

Accepted Answer

A) True 
 B)False

Question 16

Benedict's test can be used to distinguish between an aldehyde and a ketone.

Accepted Answer

A) True 
 B)False

Question 17

What is the IUPAC name of the compound shown?

Accepted Answer

A) formaldehyde 
B) acetone 
C) propanone 
D) propanal 
E) ethanal 
A) formaldehyde 
B) acetone 
C) propanone 
D) propanal 
E) ethanal

Question 18

Which of the following pairs of reactant molecules can react in the presence of a trace of acid to give a hemiacetal molecule?

Accepted Answer

A) a ketone and an aldehyde 
B) an aldehyde and an alkene 
C) an aldehyde and an alcohol 
D) two ketones 
E) two aldehydes 
A) a ketone and an aldehyde 
B) an aldehyde and an alkene 
C) an aldehyde and an alcohol 
D) two ketones 
E) two aldehydes

Question 19

The reduction of acetaldehyde is an important biochemical reaction.Which of the following is the product of its reduction?

Accepted Answer

A) 
$\mathrm { CH } _ { 3 } - \mathrm { CH } _ { 2 } - \mathrm { OH }$ 
B) 
$\mathrm { CH } _ { 3 } - \mathrm { CH } _ { 3 }$ 
C) 
  
D) 
  
E) 
  
A) 
$\mathrm { CH } _ { 3 } - \mathrm { CH } _ { 2 } - \mathrm { OH }$ 
B) 
$\mathrm { CH } _ { 3 } - \mathrm { CH } _ { 3 }$ 
C) 
  
D) 
  
E)

Question 20

What is the proper IUPAC name of the three carbon aldehyde?

Accepted Answer

A) propanal 
B) butanal 
C) acetal 
D) propanone 
E) propanol 
A) propanal 
B) butanal 
C) acetal 
D) propanone 
E) propanol

Exam 13: Aldehydes and Ketones

The compound shown below is the enol form of butanal.

What kind of compound is produced by the reaction of an aldehyde with an alcohol in the presence of a trace of acid?

What is the IUPAC name of the compound shown?

The compound decanal contributes to the odor and flavor of an orange.Which of the following statements about decanal is FALSE?

Which of the following will give a silver mirror when treated with Tollens' reagent?

What is the general formula of a ketone?

Small (low molecular weight)aldehyde molecules are generally more water-soluble than large ones.

What is the IUPAC name of the compound shown?

What is the structure of the hemiacetal produced in the following reaction?

Which of the statements concerning the compound shown below is FALSE?

Methanol is toxic if ingested.The toxicity is due to the aldehyde produced when methanol is oxidized in the liver.Which of the following is the aldehyde formed by the oxidation of methanol?

Which of the following best describes the structure of an enol?

Aldehydes are easily oxidized to carboxylic acids.

A ketone will react with Tollens' reagent to produce a silver mirror,but an aldehyde will not.

Benedict's test can be used to distinguish between an aldehyde and a ketone.

What is the IUPAC name of the compound shown?

Which of the following pairs of reactant molecules can react in the presence of a trace of acid to give a hemiacetal molecule?

The reduction of acetaldehyde is an important biochemical reaction.Which of the following is the product of its reduction?

What is the proper IUPAC name of the three carbon aldehyde?

Chemistry - Methods and Measurement

The Structure of the Atom and the Periodic Table

Structure and Properties of Ionic and Covalent Compounds

Calculations, chemical Changes, and the Chemical Equation

States of Matter: Gases, liquids, and Solids

Solutions

Energy,rate and Equilibrium

Acids and Bases

The Nucleus, radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry

The Unsaturated Hydrocarbons: Alkenes, alkynes, and Aromatics

Alcohols, phenols, thiols, and Ethers

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Lipids and Their Functions in Biochemical Systems

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Aerobic Respiration and Energy Production

Fatty Acid Metabolism

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