1. University of Kentucky
Clicker Questions
Chapter 20
Organic Chemistry
Allison Soult
University of Kentucky

2. What is the general formula for an alkyne?
CnH2n+2
CnH2n+1
CnH2n
CnH2n−1
CnH2n−2
Answer: e

3. Which two are structural isomers?
II.
III.
I and II
II and III
I and III
There are no structural isomers in this set.
Answer: d

4. Which of the following can exhibit optical isomerism?d)
Answer: c

5. Give the IUPAC name for the branched alkane pictured below.
6-butyl-4-ethyl-3-methylheptane
2-butyl-4-ethyl-5-methylheptane
4-ethyl-3,6-dimethyldecane
7-ethyl-5,8-dimethyldecane
4-ethyl-3,6-methyldecane
Answer: c

6. Which of the following compounds is most likely to have only one double bond?
Answer: c
C7H14 d)
C9H14

7. What is the name of this compound?
1-decene
3-propyl-1-heptene
4-etheneheptane
5-propyl-7-heptene
Answer:b

8. Which of the following compounds could exhibit geometric isomerism?a)
CH2=CHCH3 b)
CH3CH=CHCH3 c)
Answer: b
CCl2=CF2 d)
CHCl=CF2

9. Which class of compounds is the least reactive?
alkanes
alkenes
alkynes
They are all the same.
There is no trend in the reactivity.
Answer: a

10. What is the product when 1-butene reacts with HCl?
2-chlorobutane
1-chlorobutane
1,2-dichlorobutane
butane
Answer: a

11. Which functional groups are present in the molecule penicillin shown below?
Alcohol
Amine
Ester
Carboxylic acid
All of the above
Answer: e

12. Which of the following is the most oxidized?a) b) c) d)
Answer: d

13. Which of the following reactions is correct?b) c)
Answer: d d) e)
All are correct

14. The artificial banana scent is caused by the molecule shown below
The artificial banana scent is caused by the molecule shown below. Give the IUPAC name for this molecule.
Butyl ethanoate
Ethyl pentanoate
Methyl pentanoate
Pentyl ethanoate
Pentyl methanoate
Answer: d

15. Ethyl cinnamate (cinnamon fragrance) is produced in the following esterification reaction. Which of the following is the correct structure for ethyl cinnamate? a) b)
Answer: c c) d)

16. Polystyrene is a polymer that is commonly used in packaging and disposable food containers. Identify the monomer from the polymer structure shown below.
Answer: a a) b) c) d)