Organic Chemistry With Biological Topics 5Th Edition By Janice Smith – Test Bank

Organic Chemistry With Biological Topics 5Th Edition By Janice Smith – Test Bank

Chapter 04 Test Bank: Alkanes

Student: ___________________________________________________________________________

1. Which of the following statements about alkanes is not true?

A. Alkanes are aliphatic hydrocarbons.
B. Alkanes contain only C-C and C-H s bonds.
C. Alkanes are acyclic or cyclic.
D. Acyclic alkanes have two fewer H atoms than cyclic alkanes with the same number of carbons.

2. Which of the following statements about alkanes is true?

A. Alkanes are aliphatic hydrocarbons having only C-C and C-H p bonds.
B. Cyclic alkanes have two fewer H atoms than acyclic alkanes with the same number of carbons.
C. Acyclic alkanes contain carbons joined in one or more rings.
D. Acyclic alkanes have the general molecular formula C_nH_2n.

3. What is the molecular formula of an alkane that has twenty-three carbon atoms?

A. C₂₃H₄₆
B. C₂₃H₄₈
C. C₂₃H₅₀
D. C₂₃H₄₄

4. What is the molecular formula of a cycloalkane that has six carbon atoms?

A. C₆H₁₄
B. C₆H₁₀
C. C₆H₁₂
D. C₆H₁₆

5. What is the approximate C-C-C bond angle in propane?

A. 90∞
B. 109.5∞
C. 120∞
D. 180∞

6. What is the hybridization of a carbon atom in an alkane?

A. sp³
B. sp²
C. sp
D. p

7. How many constitutional isomers are there with the molecular formula C₅H₁₂?

A. 2
B. 3
C. 4
D. 5

8. How many constitutional isomers are there with the molecular formula C₆H₁₄?

A. 2
B. 3
C. 4
D. 5

9.  Which of the following is not another representation for 2-methylbutane?

A. I
B. II
C. III
D. IV

10.  Which of the following compounds has primary, secondary, tertiary, and quaternary carbon atoms?

A. Pentane
B. 2-Methylpentane
C. 2,2-Dimethylpentane
D. 2,2,3-Trimethylpentane

11. Which of the following compounds has only primary and secondary carbon atoms?

A. Pentane
B. 2-Methylpentane
C. 2,2-Dimethylpentane
D. 2,3,3-Trimethylpentane

12.  Which of the following compounds has only primary, secondary, and tertiary carbon atoms?

A. Pentane
B. 2-Methylpentane
C. 2,2-Dimethylpentane
D. 2,2,3-Trimethylpentane

13.  Which of the following compounds has only primary, secondary, and quaternary carbon atoms?

A. Pentane
B. 2-Methylpentane
C. 2,2-Dimethylpentane
D. 2,2,3-Trimethylpentane

14.  Which of the following compounds has primary, secondary, and tertiary hydrogen atoms?

A. Pentane
B. Hexane
C. 2-Methylpentane
D. 2,2-Dimethylpentane

15. Which of the following compounds has only primary and secondary hydrogen atoms?

A. 2-Methylpentane
B. 2,2,3-Trimethylpentane
C. 3-Methylpentane
D. 2,2-Dimethylpentane