Introduction to Organic Chemistry
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Introduction to Organic Chemistry Answer Key
1.
Which element is present in every organic compound?
- nitrogen
- oxygen
- carbon
- sulfur
2.
Which of the following is a hydrocarbon?
- propene
- ethanal
- methanol
- butanoic acid
3.
Which statement correctly describes the molecular polarity of a hydrocarbon?
- Hydrocarbons are generally nonpolar because they are asymmetrical.
- Hydrocarbons are generally polar because they are asymmetrical.
- Hydrcarbons are generally nonpolar because they are symmetrical.
- Hydrocarbons are generally polar because they are symmetrical.
4.
Which statement correctly describes one property of hydrocarbons?
- Hydrocarbons will not dissolve in water.
- Hydrocarbons have a high boiling point.
- Hydrocarbons contain ionic bonds.
- Hydrocarbons can contain oxygen atoms.
5.
Which of the following represents a saturated hydrocarbon?
- ethene
- butane
- propyne
- methanol
6.
What kind of functional group is represented by the image shown below?

- ketone
- aldehyde
- ester
- organic acid
7.
Which of the following compounds contains a double bond?
- ethane
- ethanol
- ethyne
- ethene
8.
Which statement correctly describes ethane and butane?
- They have only single bonds.
- They have the same number of hydrogen atoms.
- They have the same number of carbon atoms.
- They have only double bonds.
9.
Explain why pentyne and ethene are unsaturated hydrocarbons.
- Answers include, but are not limited to, the following:
• They contain at least one double or triple bond
• They do not contain all single bonds
10.
Name one of the functional groups in the organic molecule shown below.

- Answers include, but are not limited to, the following:
• alcohol
• ketone
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