Deck 15: Amines

Question 1

Amines are most similar in chemical structure and behavior to

A)the hydronium ion.
B)ammonia.
C)sodium hydroxide.
D)a primary alcohol.
E)water.

Answer 1

ammonia.

Question 2

Which organic functional group is important for its basic properties?

A)amine
B)aromatic
C)carbonyl
D)hydroxyl
E)phenol

Answer 2

amine

Question 3

When the nitrogen atom in an organic compound has four covalent bonds,it is called a

A)primary amine.
B)secondary amine.
C)tertiary amine.
D)quaternary ammonium ion.
E)tetraammine.

Answer 3

quaternary ammonium ion.

Question 4

Which of the following molecules is an example of a secondary amine?

A)

B)

C)

D)

E)

Question 5

Amines can be considered organic derivatives of the inorganic compound

A)ammonia.
B)carbon dioxide.
C)sodium hydroxide.
D)water.
E)none of these

Question 6

Which molecule is N,N-dimethylpropylamine?

A)CH₃CH₂CH₂CH₂CH₂ H₂
B)

C)

D)

E)

Question 7

Which compound is a secondary amine?

A)trimethylamine
B)diethylamine
C)isopropylamine
D)N,N-dimethylethylamine
E)N-ethyl-N-methylpropylamine

Question 8

Which molecule shown is trimethylamine?

A)CH₃CH₂CH₂CH₂CH₂ H₂
B)

C)

D)

E)

Question 9

Which molecule is a tertiary amine?

A)

B)

C)

D)

E)

Question 10

All of the following compounds are amines except

A)amphetamine.
B)histamine.
C)aniline.
D)aspirin.
E)caffeine.

Question 11

Which compound is a primary amine?

A)trimethylamine
B)diethylamine
C)isopropylamine
D)N,N-dimethylethylamine
E)N-ethyl-N-methylpropylamine

Question 12

Which molecule shown is N,N-dimethylethylamine?

A)CH₃CH₂CH₂CH₂CH₂ H₂
B)

C)

D)

E)

Question 13

Which class of amines can form intermolecular hydrogen bonds?

A)1°
B)2°
C)3°
D)A and B
E)all of the above

Question 14

What is the correct IUPAC name of the compound shown?

A)N-methyl aniline
B)2-methyl aniline
C)1-methyl aniline
D)1-methyl-2-aniline
E)1-methyl-1-aniline

Question 15

Which of the following molecules is an example of a primary amine?

A)

B)

C)

D)

E)

Question 16

Amines are classified by

A)the number of alkyl groups attached to the nitrogen.
B)the number of hydrogens attached to the nitrogen.
C)the number of carbons attached to the carbon bonded to the nitrogen.
D)the number of carbons present in the molecule.
E)none of the above

Question 17

What is the correct IUPAC name for the following compound?

A)ethyl phenyl amine
B)N-ethyl aniline
C)ethyl aniline
D)2-ethyl aniline

Question 18

What is the IUPAC name of the compound shown?

A)isopropylamine
B)propylamine
C)2-propylamine
D)1-methylethylamine
E)N-methylethylamine

Question 19

Which amine has the lowest boiling point?

A)

B)

C)

D)

E)

Question 20

All of the following are properties of amines except

A)they frequently have offensive odors.
B)those that can form hydrogen bonds have higher boiling points than expected for their molecular weight.
C)those with low molecular weights are soluble in water.
D)they react with acids to form amides.
E)they act as bases in many reactions.

Question 21

Which amine has the highest boiling point?

A)

B)

C)

D)

E)

Question 22

When an amine behaves as a base it ________ a hydrogen ion to form a(an)________ ion.

A)loses; hydronium
B)loses; ammonium
C)loses; hydroxide
D)gains; ammonium
E)gains; hydronium

Question 23

Lemon juice can be used to remove the odor of fish on a person's hands after cleaning fish.The chemical explanation for this is that the

A)pleasant odor of the lemon juice covers the fishy odor.
B)acid in the lemon juice reacts with the odor-causing amines to form an odorless salt.
C)acid in the lemon juice increases the volatility of the odor-causing amines.
D)lemon juice dilutes the odor-causing amines.
E)lemon juice removes the bitter flavor often associated with nitrogen compounds.

Question 24

Which type of amine will react with mineral acids to form soluble ammonium salts?

A)1°
B)2°
C)3°
D)A and B
E)A,B and C

Question 25

The boiling point of ethylamine is higher than that of propane but lower than that of 1-propanol.This means that

A)a molecule of ethylamine cannot form a hydrogen bond with another molecule of itself
B)hydrogen bonds between two amino groups are weaker than those between two alcohol groups
C)the intermolecular forces between two amine molecules are only dipole-dipole
D)the intermolecular forces between two amine molecules are ionic in nature
E)the intermolecular forces between two amine molecules are only London dispersion forces.

Question 26

Which formula best represents the form an amine takes in acidic solution?

A)RNH₂
B)RNH^-
C)RNH₂^-
D)RNH₂⁺
E)RNH₃⁺

Question 27

Which molecule listed is heterocyclic?

A)aniline
B)phenol
C)pyridine
D)benzoic acid
E)naphthalene

Question 28

An amine that is insoluble in water can be made to dissolve by adding it to an aqueous solution of

A)HCl.
B)NaOH.
C)a different amine.
D)an amide.
E)none of the above; it can't be made water soluble.

Question 29

Some amine drugs are administered in the form of salts in order to

A)make them form into pills more easily
B)make them taste bitter
C)make them more basic
D)make them more soluble in body fluids

Question 30

Which compound is an example of an amine salt?

A)histamine
B)methylammonium chloride
C)thioacetamide
D)sulfanilamide
E)pyridoxine

Question 31

Which of these types of compounds forms salts with acids?

A)ketones
B)amines
C)alcohols
D)carboxylic esters
E)ethers

Question 32

The reaction of an amine with water is best represented by

A)R-NH₂ + 2 H₂O

R-N^2- + 2 H₃O⁺.
B)R-NH₂ + H₂O

R-NH^- + H₃O⁺.
C)R-NH₂ + H₂O

R-NH₃⁺ + OH^-.
D)R-NH₂ + 2 H₂O

R-NH₄⁺² + 2 OH^-.
E)R-NH₂ + H₂O

R-N^2- + M⁺ + H₃O⁺.

Question 33

Arrange the following compounds in order of increasing boiling point.List and describe the criteria that must be considered in answering this question.
Compounds
1.CH₃CH₂CH₂CH₂OH 2.CH₃CH₂CH₂NHCH₃
3.CH₃CH₂CH₂CH₂CH₃ 4.CH₃CH₂N(CH₃)CH₃
5.CH₃CH₂CH(OH)CH₃

Question 34

Which of the following is a heterocyclic amine?

A)

B)

C)

D)

Question 35

Which molecule is a heterocyclic compound?

A)

B)

C)

D)

E)none of these

Question 36

The reaction that occurs between an amine and an acid is best illustrated by

A)(CH₃)₂NH + HCl → (CH₃)₂NH ⁺ Cl^-.
B)(CH₃)₂NH + HCl → (CH₃)₂NH Cl^- + H₃O⁺.
C)(CH₃)₂NH + HCl → (CH₃)₂NH₂ ⁺ Cl^-.
D)(CH₃)₂NH + HCl → (CH₃)₂NH₂⁺ + OH^-.
E)(CH₃)₂NH + H₂O → (CH₃)₂N + H₃O⁺.

Question 37

The following is an example of a

A)tertiary amine.
B)quanternary amine.
C)tertiary ammonium salt.
D)quaternary ammonium salt.
E)secondary ammonium salt.

Question 38

If methylamine reacts with hydrochloric acid,the major product will be

A)ammonium chloride.
B)dimethylammonium chloride.
C)methylammonium chloride.
D)trimethylammonium chloride.
E)methylammonium hydroxide.

Question 39

When comparing amine compounds of different classes but similar molar masses,which type will most likely be the highest boiling point?

A)primary amines
B)secondary amines
C)tertiary amines
D)quaternary ammonium salts

Question 40

What is the most important chemical property of amines?

A)They are weak bases.
B)They are strong bases.
C)They are weak acids.
D)They are strong acids.
E)They are oxidizing acids.

Question 41

All of the following are nitrogen-containing compounds found in living organisms except

A)nucleotides.
B)proteins.
C)neurotransmitters.
D)carbohydrates.
E)alkaloids.

Question 42

The reaction of the pyridinium ion with water is best represented as ________.

A)C₅H₅NH⁺ + H₂O

C₅H₅N + H₃O⁺
B)C₅H₅NH⁺ + H₂O

C₅H₅NH₂²⁺ + OH^-
C)C₅H₅N + H₂O

C₅H₄N + H₃O⁺
D)C₅H₅N + H₂O

C₅H₆NH⁺
E)none of these

Question 43

An alkaloid is best described as any

A)basic compound obtained from a plant.
B)amide obtained from a plant.
C)basic compound obtained from either an animal or a plant.
D)diamine obtained from an animal.
E)both A and B.

Question 44

All of the following are characteristics of alkaloids except

A)bitter tasting.
B)physiologically active.
C)basic.
D)toxic to humans in high doses.
E)pleasant smelling.

Question 45

An alkaloid used in treating malaria is

A)quinine.
B)histamine.
C)atropine.
D)nicotine.

Question 46

Which compound is an example of an amine salt?

A)

B)

C)

D)

E)