Question 1

Which of the following is a correct statement about the polarity of amines?

Accepted Answer

A)  Amines are nonpolar compounds; therefore, the N-H bond is nonpolar. 
B)  The polarity of the N-H bond is less than that of the O-H bond. 
C)  The polarity of the N-H bond is the same as that of the O-H bond. 
D)  The polarity of the N-H bond is greater than that of the O-H bond. 
A)  Amines are nonpolar compounds; therefore, the N-H bond is nonpolar. 
B)  The polarity of the N-H bond is less than that of the O-H bond. 
C)  The polarity of the N-H bond is the same as that of the O-H bond. 
D)  The polarity of the N-H bond is greater than that of the O-H bond. B

Question 2

Which of the following compounds is (s)-n-methyl-2-butanamine?

Accepted Answer

A)  (i) only 
B)  (ii) only 
C)  (iii) only 
D)  (i) and (ii) only 
A)  (i) only 
B)  (ii) only 
C)  (iii) only 
D)  (i) and (ii) only D

Question 3

A mixture containing 2-octanol, cyclohexanamine, and potassium chloride is separated using the process shown in the given flowchart.   From which layer can potassium chloride be extracted?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  from all layers 
A)  A 
B)  B 
C)  C 
D)  from all layers C

Question 4

What is the common name of the following compound?

Accepted Answer

A)  aniline bromine 
B)  aniline bromide 
C)  anilinium bromine 
D)  anilinium bromide 
A)  aniline bromine 
B)  aniline bromide 
C)  anilinium bromine 
D)  anilinium bromide

Question 5

Which of the following is not an alkaloid?

Accepted Answer

A)  cocaine 
B)  coniine 
C)  nicotine 
D)  phentermine 
A)  cocaine 
B)  coniine 
C)  nicotine 
D)  phentermine

Question 6

Which type of amine is purine?

Accepted Answer

A)  a straight-chain primary amine 
B)  a heterocyclic aromatic amine 
C)  a heterocyclic aliphatic amine 
D)  a straight-chain tertiary amine 
A)  a straight-chain primary amine 
B)  a heterocyclic aromatic amine 
C)  a heterocyclic aliphatic amine 
D)  a straight-chain tertiary amine

Question 7

Which of the following is a primary amine?

Accepted Answer

A)  albuterol 
B)  epinephrine 
C)  norepinephrine 
D)  all of these 
A)  albuterol 
B)  epinephrine 
C)  norepinephrine 
D)  all of these

Question 8

What occurs when amines react with water?

Accepted Answer

A)  The amine loses a hydrogen atom. 
B)  The amine loses a lone pair of electrons. 
C)  The lone pair of electrons of the amine forms a covalent bond with a hydrogen atom of water and a hydronium ion is displaced. 
D)  The lone pair of electrons of the amine forms a covalent bond with a hydrogen atom of water and a hydroxide ion is displaced. 
A)  The amine loses a hydrogen atom. 
B)  The amine loses a lone pair of electrons. 
C)  The lone pair of electrons of the amine forms a covalent bond with a hydrogen atom of water and a hydronium ion is displaced. 
D)  The lone pair of electrons of the amine forms a covalent bond with a hydrogen atom of water and a hydroxide ion is displaced.

Question 9

Which type of amine is phentermine?

Accepted Answer

A)  a primary aliphatic amine 
B)  a primary aromatic amine 
C)  a tertiary aliphatic amine 
D)  a tertiary aromatic amine 
A)  a primary aliphatic amine 
B)  a primary aromatic amine 
C)  a tertiary aliphatic amine 
D)  a tertiary aromatic amine

Question 10

Consider the given reaction. If the Kb of a certain amine is 4.50 × 10-4, then what is the approximate ratio of the protonated and the unprotonated amine at pH 7.00? RNH2 (aq) + H2O(l) RNH3+(aq) + OH-(aq)

Accepted Answer

A)  4500 : 1 
B)  1 : 4500 
C)  45 : 1 
D)  1 : 45 
A)  4500 : 1 
B)  1 : 4500 
C)  45 : 1 
D)  1 : 45

Question 11

In which form do aromatic amines exist in human blood at pH 7.4?

Accepted Answer

A)  largely in the unprotonated form 
B)  largely in the protonated form 
C)  as a mixture of neutral molecules and their conjugate acids 
D)  largely as their conjugate acids 
A)  largely in the unprotonated form 
B)  largely in the protonated form 
C)  as a mixture of neutral molecules and their conjugate acids 
D)  largely as their conjugate acids

Question 12

What is the IUPAC name of the following compound?

Accepted Answer

A)  1,2-dimethylaniline 
B)  1,2-dimethyl-4-aminobenzene 
C)  3,4-dimethylaniline 
D)  3,4-dimethylcyclohexanamine 
A)  1,2-dimethylaniline 
B)  1,2-dimethyl-4-aminobenzene 
C)  3,4-dimethylaniline 
D)  3,4-dimethylcyclohexanamine

Question 13

What is the IUPAC name of the following compound?

Accepted Answer

A)  ethylpropylmethylamine 
B)  N-ethyl-N-methylpropanamine 
C)  N-ethyl-N-methyl-1-propanamine 
D)  N-ethyl-N-methyl-2-propanamine 
A)  ethylpropylmethylamine 
B)  N-ethyl-N-methylpropanamine 
C)  N-ethyl-N-methyl-1-propanamine 
D)  N-ethyl-N-methyl-2-propanamine

Question 14

What is the common name of CH3−NH−C2H5?

Accepted Answer

A)  ethylmethylamine 
B)  methylethylamine 
C)  N-methylethanamine 
D)  propanamine 
A)  ethylmethylamine 
B)  methylethylamine 
C)  N-methylethanamine 
D)  propanamine

Question 15

Which of the following is not a heterocyclic aliphatic amine?

Accepted Answer

A)  piperidine 
B)  pyrrolidine 
C)  pyrimidine 
D)  all of these 
A)  piperidine 
B)  pyrrolidine 
C)  pyrimidine 
D)  all of these

Question 16

What is the IUPAC name of the following compound?

Accepted Answer

A)  1-amino-4-methylbenzene 
B)  4-aminotoluene 
C)  4-methylaniline 
D)  p-toluidine 
A)  1-amino-4-methylbenzene 
B)  4-aminotoluene 
C)  4-methylaniline 
D)  p-toluidine

Question 17

The structure of gabapentin-a drug for treating epilepsy-is given. Which type of amine is gabapentin?

Accepted Answer

A)  1° 
B)  2° 
C)  3° 
A)  1° 
B)  2° 
C)  3°

Question 18

Which of the following is a primary amine?

Accepted Answer

A)  albuterol 
B)  epinephrine 
C)  isoproterenol 
D)  none of these 
A)  albuterol 
B)  epinephrine 
C)  isoproterenol 
D)  none of these

Question 19

Which of the following can be used to separate a mixture of cyclopentanamine and cyclopentanol dissolved in diethyl ether?

Accepted Answer

A)  aqueous HCl 
B)  aqueous HNO3 
C)  aqueous ammonia 
D)  none of these 
A)  aqueous HCl 
B)  aqueous HNO3 
C)  aqueous ammonia 
D)  none of these

Question 20

What is the common name of (CH3)4N+Br−?

Accepted Answer

A)  trimethylamine bromide 
B)  trimethylammonium bromide 
C)  tetramethylamine bromine 
D)  tetramethylammonium bromide 
A)  trimethylamine bromide 
B)  trimethylammonium bromide 
C)  tetramethylamine bromine 
D)  tetramethylammonium bromide

Exam 15: Amines

Which of the following is a correct statement about the polarity of amines?

Which of the following compounds is (s)-n-methyl-2-butanamine?

A mixture containing 2-octanol, cyclohexanamine, and potassium chloride is separated using the process shown in the given flowchart. From which layer can potassium chloride be extracted?

What is the common name of the following compound?

Which of the following is not an alkaloid?

Which type of amine is purine?

Which of the following is a primary amine?

What occurs when amines react with water?

Which type of amine is phentermine?

Consider the given reaction. If the Kb of a certain amine is 4.50 × 10-4, then what is the approximate ratio of the protonated and the unprotonated amine at pH 7.00? RNH2 (aq) + H2O(l) RNH3+(aq) + OH-(aq)

In which form do aromatic amines exist in human blood at pH 7.4?

What is the IUPAC name of the following compound?

What is the IUPAC name of the following compound?

What is the common name of CH3−NH−C2H5?

Which of the following is not a heterocyclic aliphatic amine?

What is the IUPAC name of the following compound?

The structure of gabapentin-a drug for treating epilepsy-is given. Which type of amine is gabapentin?

Which of the following is a primary amine?

Which of the following can be used to separate a mixture of cyclopentanamine and cyclopentanol dissolved in diethyl ether?

What is the common name of (CH3)4N+Br−?

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Consider the given reaction. If the K_b of a certain amine is 4.50 × 10^-4, then what is the approximate ratio of the protonated and the unprotonated amine at pH 7.00? RNH₂ (aq) + H₂O(l) RNH₃⁺(aq) + OH^-(aq)

What is the common name of CH₃−NH−C₂H₅?

What is the common name of (CH₃)₄N⁺Br−?