Organic Chemistry Practice Questions with Answers (Set 2)

 

1. What is the longest carbon chain for the compound shown?

A.7
B.8
C.9
D.10

2. The IUPAC name for the following compound is _____.

A.2-ethylbutane
C.3-methylpentane

B.2-methylbutane
D.3-ethylbutane

3. An alkane with 10 carbon atoms is a ____ at room temperature.

A.solid
B.liquid
C.gas
D.can’t tell

4. Alkanes are ____ in water and ____ than water.

A.insoluble, less dense
C.insoluble, more dense
B.soluble, less dense
D.soluble, more dense

5. Complete combustion of pentane produces _____ .

A.CO and H2O
B.CO2 and H2O
C.CO2 and CO
D.CO and C

6. Alkanes react readily with _____ .

A.sodium hydroxide
C.sulfuric acid
B.hydrochloric acid
D.none of the choices

7. The structural formula of 1-bromo-2,2-dimethylbutane is _____ .

8. What is the IUPAC name for the following alkane?


A.2-ethylpropane
C.Pentane

B.2-methylbutane
D.3,3-dimethylpropane

9. Give the IUPAC name for the following chemical.

A.3,6-diethyl-3-methylnonane
C.2,2,5-triethyloctane

B.2,2,5,6-tetraethylhexane
D.3-ethyl-3-methyl-6-propyldecane

10. You arrive home from class to find your roommate complaining of a headache, dizziness, and nausea. Upon
further investigation you believe they may have carbon monoxide poisoning. What should be the first step
taken?

A.remove the victim to fresh air
B.inspect the house for leaks
C.close off the house to not affect the outside
D.none of the choices

11. Three physical properties shown below beside different alkane series. Which of the series is(are) listed in
the order of increase (lowest to highest) for the corresponding property?

A.Density: C4H10 < C5H12 < C8H18
C.Boiling Point: C5H12 < C4H10 < C8H18

B.Melting Point: C8H18 < C5H12 < C4H10
D.All are correctly ranked.

12. When ethane burns in a limited supply of oxygen, the chemical reaction would be which of the following?

13. What is the most common type of bond found in organic molecules?

A.covalent
B.ionic
C.metallic
D.coordinated

14. The condensed structural formula for 2,3-dimethylbutane would be which of the following?

A.CH3CH2CH2CH2CH3
C.CH3CH(CH3)CH(CH3)CH3

B.CH3CH2C(CH3)2CH2CH3
D.CH3CH(CH3)CH(CH3)CH2CH3

15. Isomers always have the same empirical formula.

A. True
B. False

16. Carbon-carbon bonds are usually strong and covalent.

A. True
B. False

17. When one conformation of an alkane changes into another, there is rotation about carbon-carbon single
bonds.

A. True
B. False

18. Since all alkanes are saturated hydrocarbons, all of the carbon atoms are aligned in one continuous chain.

A. True
B. False

19. The major use for hydrocarbons is combustion for energy.

A. True
B. False

20. There are more inorganic compounds than organic compounds.

A. True
B. False

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