Organic Chemistry 4th Edition By Janice Smith – Test Bank

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 σ 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 π 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 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

C)

2,2-Dimethylpentane

B)

2-Methylpentane

D)

2,2,3-Trimethylpentane