Organic Chemistry Practice Questions with Answers (Set 3)

1. What number would be used to indicate the double bond position in the IUPAC name for:

CH3–CH2–CH=CH–CH3

A.1
B.2
C.3
D.4

2. In the IUPAC name for the following compound, the -Br group is located at what position of the compound shown? CH3CHBrCH=CH2

A.1
B.2
C.3
D.4

3. What is the IUPAC name for the compound shown below?

A.3-ethyl-1-pentene
C.3-ethyl-3-pentene
B.2-ethyl-2-pentene
D.2-ethyl-1-pentene

4. What is the IUPAC name for the compound shown below?

A.2-methyl-1,4-pentadiene
C.4-methyl-1,3-pentadiene
B.2-methyl-2,4-dipentene
D.4-methyl-2,4-pentadiene

5. Which of the following is the correct IUPAC name for the following compound?

A.5-bromo-1,3-cyclohexadiene
C.2-bromo-1,4-cyclohexadiene
B.6-bromo-1,3-cyclohexadiene
D.3-bromo-1,5-cyclohexadiene

6. Which of the following compounds is trans-3-hexene?

7. Which of the compounds below could correctly be called a cis compound?

 

8. Which of the following represents an addition reaction?

A. HX + C4H8 –> C4H9X
C. C4H8 –> C4H6 + H2

B. X2 + C3H6 –> C3H5X + HX
D. more than one response is correct

9. Select the major product that would result from the reaction below.

CH3-CH=CH2 + H2O

A.CH3CH(OH)CH3
C.CH3CH2CH3

B.CH3CH2CH2OH
D.CH3CH2CH2SO4

10. Select the major product that would result from the reaction below.

CH3CH2CH=CH2 + HBr –>

A.CH3(CHBr)2CH3
C.CH3CHBrCH2CH3

B.CH2CH2CH2CH3
D.CH3CH2CH2CH2Br

11. What reagent or reagents is required for the conversion of cyclohexene to cyclohexane?

A.HCl
C.H2 and H2SO4

B.H2O and H2SO4
D.H2 and Pt

12. Which is the formula for an alkene?

A.CH3CHCH2
C.CH3CH3CH2

B.CH3CH2CH2
D.More than one response is correct.

13. Which is the formula for an alkyne?

A.CH3CH2CCH2
C.CH3CH2CCH

B.CH3CH2CH2CH3
D.CH3CH2CCH2

14. Which is a difference between butane and butene?

A.butane burns and butene does not
C.they are isomers

B.the presence of a double bond
D.the presence of a triple bond

15. Which is a difference between butene and cyclobutene?

A. They are isomers.
B. Cyclobutene has 2 double bonds, butene does not.
C.The location of the double bond is terminal in cyclobutene, but between interior
carbons in butene.
D. Cyclobutene is missing more hydrogens than is butene.

16. Which of the following is the correct IUPAC name for the compound CH2?C?C?CH2?CH2?Br?

A.4-bromopentyne
C.1-bromo-3-pentyne

B.1-bromo-2-pentyne
D.5-bromo-2-pentyne

17. Which of the following structures is not correct?

18. The benzene ring as a branch is called a _____ group.

A.hexyl
B.benzyl
C.phenol
D.phenyl

19. What is the correct name for:

A.3-phenyl-1-propene
C.1-phenyl-2-propene

B.1-phenyl-1-propene
D.3-phenyl-2-propene

20. Name the following compound.

A.5-bromo-2-hexyne
C.1-bromo-1-methyl-3-pentyne

B.bromo-4-hexyne
D.none of these are correct

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