Deck 16: Amines

Question 1

Which of the following line bond drawings correctly represents N,N-diisopropylamine?

A)

B)

C)

D)

E)

Answer 1

Question 2

Amines are classified by the number of

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

Answer 2

alkyl groups attached to the nitrogen.

Question 3

What is the IUPAC name of the compound shown?

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

Answer 3

N-methylethylamine

Question 4

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 5

Which molecule is N,N-dimethylpropylamine?

A)C -C-C-C-C-N
B)

C)

D)

E)

Question 6

Write the correct name for the following and determine if it contains a primary,secondary,or tertiary amine.

A)

B)

C)

Question 7

Which molecule shown is trimethylamine?

A)C -C-C-C-C-N
B)

C)

D)

E)

Question 8

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 act as bases in many reactions.
E)All of these are properties of amines.

Question 9

Which molecule shown is N,N-dimethylethylamine?

A) C -C-C-C-C-N
B)

C)

D)

E)

Question 10

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.

Question 11

Which molecule is a tertiary amine?

A)

B)

C)

D)

E)

Question 12

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 13

Which of the following structures represents the compound 2-amino-2-methylbutane?

A)

B)

C)

D)

E)

Question 14

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

A)

B)

C)

D)

E)

Question 15

Which compound is a secondary amine?

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

Question 16

Which organic functional group is important for its basic properties?

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

Question 17

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 18

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

A)

B)

C)

D)

E)

Question 19

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.

Question 20

Which compound is a primary amine?

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

Question 21

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 22

Which of the following is a heterocyclic amine?

A)

B)

C)

D)

Question 23

Which molecule is a heterocyclic compound?

A)

B)

C)

D)

E)none of these

Question 24

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 25

Which amine has the highest boiling point?

A)

B)

C)

D)

Question 26

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 27

Which of the following compounds contains both a heterocylic amine and an amino group in the same molecule?

A)nicotine
B)caffeine
C)tryptophan
D)quinine
E)purine

Question 28

All of the following compounds are amines except

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

Question 29

Using dashed lines illustrate how ethyl amine would hydrogen bond with water,increasing its solubility.

Question 30

Using dashed lines show how two molecules of ethylamine could possibly hydrogen bond to each other.

Question 31

Which molecule listed is heterocyclic?

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

Question 32

The reaction of an amine with water is best represented by

A)R-NH₂ + 2H₂O
R-N^2- + 2H₃O⁺.
B)R-NH₂ + H₂O
R-NH^- + H₃O⁺.
C)R-NH₂ + H₂O
R-NH₃⁺ + OH^-.
D)R-NH₂ + 2H₂O
R-NH₄⁺² + 2OH^-.
E)R-NH₂ + H₂O
R-N^2- + M⁺ + H₃O⁺.

Question 33

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 34

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 35

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 36

Which amine has the lowest boiling point?

A)

B)

C)

D)

Question 37

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 38

Which class of amines cannot form intermolecular hydrogen bonds?

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

Question 39

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

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

Question 40

Which of the following amines would be the most soluble in water?

A)butylamine
B)propylamine
C)ethylamine
D)pentylamine
E)isopropylamine

Question 41

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 42

An alkaloid that is a chemically altered opiate known for its very addictive properties is

A)morphine.
B)codeine.
C)atropine.
D)coniine.
E)heroin.

Question 43

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 44

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 45

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

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

Question 46

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 47

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 48

An alkaloid used in treating malaria is

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

Question 49

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 50

Write the complete reaction for the following:

A)aniline + HBr(aq)
B)propyl amine + water

Question 51

An alkaloid that is the major component in opium and is used to treat patients for pain after major surgeries is

A)atropine.
B)nicotine.
C)morphine.
D)reserpine.
E)caffeine.

Question 52

To regenerate a free amine from an ammonium salt which of the following may be used?

A)strong acid
B)an another ammonium salt
C)strong base
D)an amide
E)none of the above

Question 53

Which compound is an example of an amine salt?

A)

B)

C)

D)

E)

Question 54

Provide the products for the following reactions:

A)

B)

Question 55

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 56

Which compound is an example of an amine salt?

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

Question 57

Which of these types of compounds forms salts with acids?

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

Question 58

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

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

Question 59

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.