Choose the correct answer for each question.

1. The carbon-carbon bonds in alkanes are

   1.   ?    double bonds
   2.   ?    polar
   3.   ?    free to rotate
   4.   ?    None of the above

2. Which one of the following compounds is saturated?

   1.   ?    1-butene
   2.   ?    2,2,4-trimethylpentane
   3.   ?    cis-2-pentene
   4.   ?    1,3,5-octatriyne
   5.   ?    None of the above

3. How many hydrogens are in the compound 1,3,5-octatriyne?

   1.   ?    2
   2.   ?    4
   3.   ?    6
   4.   ?    8

4. Which of the following compounds contains a ketone functional group?

   1.   ?    CH₃COOH
   2.   ?    CH₃CH₂OH
   3.   ?    CH₃CH₂OCH₂CH₃
   4.   ?    CH₃COCH₃

5. Name the ester formed from the reaction between methanol and acetic acid (ethanoic acid).

   1.   ?    methyl ethanoate
   2.   ?    ethyl methanoate
   3.   ?    methyl ethanone
   4.   ?    ethyl methanone

6. The physical state of the smallest alkanes at room temperature are

   1.   ?    gas
   2.   ?    liquid
   3.   ?    solid
   4.   ?    Any of the three states are possible.

7. Which of the following compounds is likely to have the highest octane rating?

   1.   ?    n-heptane
   2.   ?    4-ethyl-2,2,4,5-tetramethylhexane
   3.   ?    2-methylpentane
   4.   ?    2,2-dimethyloctane

8. Which one of the following compounds is impossible?

   1.   ?    4-methyl-1,2,3-pentatriene
   2.   ?    1,2-dimetylcyclobutane
   3.   ?    para-dichlorobenzene
   4.   ?    4,4-dimethyl-1,2-pentadiyne

9. Which one of the following compounds is a structural isomer of butane?

   1.   ?    2-methylbutane
   2.   ?    2,2-dimethylbutane
   3.   ?    2-methylpropane
   4.   ?    2,2-dimethylpropane

10. Benzene is known as an ___________________ hydrocarbon, and when it is a substituent is called _____________________.

    1.   ?    aliphatic; benzyl
    2.   ?    aromatic; benzyl
    3.   ?    aliphatic; phenyl
    4.   ?    aromatic; phenyl

11. The C=O is known as a _________________________ group.

    1.   ?    carboxyl
    2.   ?    hydroxyl
    3.   ?    carbonyl
    4.   ?    aromatic

12. Organic compounds that do not contain a benzene ring are known as

    1.   ?    aliphatic
    2.   ?    nonbenzoic
    3.   ?    saturated
    4.   ?    noncyclic

13. Name the compound that would form from the oxidation (loss of hydrogen) of sec-butylalcohol

    1.   ?    butanal
    2.   ?    2-butanone
    3.   ?    isopropyl alcohol
    4.   ?    No reaction will occur

14. A carbon in a benzene ring can best be described as

    1.   ?    sp³ hybridized with a trigonal pyramidal geometry.
    2.   ?    sp³ hybridized with a tetrahedral geometry.
    3.   ?    sp² hybridized with a tetrahedral geometry.
    4.   ?    sp² hybridized with a trigonal planar geometry.

15. The hydrogenation of unsaturated alkenes can best be described as a(n) ________________________.

    1.   ?    Oxidation reaction.
    2.   ?    Esterification.
    3.   ?    Dehydration reaction.
    4.   ?    Addition reaction.