Author Question: Which of the following statements is false? A) Furan, pyrrole, and thiophene are more reactive ... (Read 88 times)

sammy · **on:** Aug 23, 2018

Which of the following statements is false?
A)
Furan, pyrrole, and thiophene are more reactive than benzene in electrophilic aromatic substitution.
B)
Electrophilic substitution in pyridine occurs mainly in the 2- and 4-positions.
C)
Electrophilic substitution in furan, pyrrole, and thiophene occurs mainly in the 2-position.
D)
Pyridine is more basic than pyrrole.
E)
An unshared electron pair on O, N, or S is part of the aromatic p system in furan, pyrrole, and thiophene.

Question 2

Which of the following heterocyclic compounds is not aromatic?
A)

D)

B)

E)

C)

Question 3

Which of the following molecules can be classified as a heterocycle?
A)

D)

B)

E)

C)

Question 4

The structural formula for furan is:
A)

D)

B)

E)

C)

Question 5

The name of

is:

A)
pyrrole
B)
furan
C)
pyridine
D)
pyrimidine
E)
thiophene

Question 6

What type of heterocycle is present in both histamine and histidine?

A)
indole
B)
pyrimidine
C)
purine
D)
imidazole
E)
thiazole

Question 7

What type of heterocycle is found in guanine?

A)
purine
B)
pyrimidine
C)
pyridine
D)
quinoline
E)
oxazole

Question 8

To what family of heterocyclic compounds do both serotonin and tryptophan belong?

A)
imidazole
B)
oxazole
C)
thiazole
D)
indole
E)
pyridazine

Question 9

The name of the heterocycle below is:

A)
pyrrole
B)
furan
C)
thiophene
D)
pyryllium
E)
phenol

Question 10

The name of the heterocycle below is:

A)
pyrrole
B)
furan
C)
thiophene
D)
pyryllium
E)
phenol

Question 11

The heterocycle cytosine, found in nucleic acids, is an example of a:
A)
purine
B)
pyrimidine
C)
pyridine
D)
piperidine
E)
pyrazine

hramirez205 · **Reply #1 on:** Aug 23, 2018

Answer to Question 1

b

Answer to Question 2

d

Answer to Question 3

a

Answer to Question 4

d

Answer to Question 5

c

Answer to Question 6

d

Answer to Question 7

a

Answer to Question 8

d

Answer to Question 9

c

Answer to Question 10

a

Answer to Question 11

b