Chapter 11: Alkynes
1. Which of the following molecular formulas is consistent with the formula for a molecule containing one alkyne and no other degrees of unsaturation?
A) I B) II C) III D) IV
2. Which of the following represents a terminal alkyne?
A) Only I and II B) Only II and III C) Only I and III D) Only II and IV
3. Which of the following represents an internal alkyne?
A) Only I and II B) Only I and III C) Only II and IV D) Only II and III
4. Which of the following alkynes is a symmetrical alkyne?
A) I B) II C) III D) IV
5. How many degrees of unsaturation are introduced by a triple bond?
A) 0 B) 1 C) 2 D) 3
6. How many bonds and bonds are present in a triple bond?
A) One bond and one bond. C) Two bonds and one bond.
B) One bond and two bonds. D) Two bonds and two bonds.
7. Which of the following statements about alkynes is not true?
A) Alkynes undergo many addition reactions.
B) Alkynes are more polarizable than alkenes.
C) Both bonds of a C-C triple bond are weaker than a C-C bond.
D) The electrons in the bonds of alkynes are more tightly held than those of alkenes.
8. Give the IUPAC name for the following compound.
A) 6,6-Dimethyl-3-octyne C) 3,3-Dimethy-5-octyne
B) 3,3-Dimethyl-3-octyne D) 6-Ethyl-6-methyl-3-heptyne
9. Give the IUPAC name for the following compound.
A) 4,4-Diethyl-1-octyne C) 4,4-Dipropyl-6-heptyne
B) 4,4-Dipropyl-1-heptyne D) 4,4-Diethyl-6-octyne
10. Give the IUPAC name for the following compound.
A) 4-Chloro-4-methyl-2-heptyne C) 3-Chloro-3-methyl-4-hexyne
B) 3-Chloro-3-methyl-4-heptyne D) 4-Chloro-4-methyl-2-hexyne
Answer Key
1. C
2. D
3. B
4. C
5. C
6. B
7. D
8. A
9. B
10. D
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