Chemistry 2202 Unit 3 Test 1Page 1 of 8

Chemistry 2202

Unit 3 Test 1

2006 - 2007

Part 1 -Multiple Choice: Complete using the answer form on page 4.

  1. How did organic chemistry get its name?
  2. animal organs produce organic chemicals, but plant organs do not
  3. organic chemicals are produced by living organisms
  4. organic fruits and vegetables are chemical free
  5. organs (the musical kind) are made completely of organic chemicals
  1. Why do organic compounds vastly outnumber inorganic compounds?

A.Carbon makes up over 90% of the earth's atmosphere.

B.Carbon makes up over 90% of the earth's crust.

C.Carbon's high bonding capacity enables it to bond it a variety of ways.

D.Carbon's high number of lone pairs of electrons gives it greater molecular stability.

  1. Which belongs to the group with the general formula CnH2n+2 ?
  2. benzene
  3. ethene
  4. pentyne
  5. propane
  1. How many carbons are in a molecule of hexane?
  2. 3
  3. 4
  4. 5
  5. 6
  1. What is the IUPAC name of compound on the right?
  2. 4-ethyl-1,1,4-trimethylpentane
  3. 2-ethyl-2,4,4-trimethylpentane
  4. 2,5,5-trimethylheptane
  5. 3,3,6-trimethylheptane
  1. Which correctly describes the structure of 3-hexene?
  2. a chain of 6 carbon atoms with a double bond between carbons 3 and 4
  3. a chain of 6 carbon atomswith a triple bond between carbons 3 and 4
  4. a chain of 7 carbon atomswith a double bond between carbons 3 and 4
  5. a chain of 7 carbon atomswith a triple bond between carbons 3 and 4

  1. What is the IUPAC name of this compound?
  2. 2,2-dimethyl-3-heptene
  3. 2,2-dimethyl-4-heptene
  4. 6,6-dimethyl-3-heptene
  5. 6,6-dimethyl-4-heptene
  1. What is the name for the structure on the right?
  2. cis-2-pentene
  3. cis-3-pentene
  4. trans-2-pentene
  5. trans-3-pentene
  1. Which is the condensed structural diagram for 3-methyl-1-pentyne?

Chemistry 2202 Unit 3 Test 1Page 1 of 8


Chemistry 2202 Unit 3 Test 1Page 1 of 8

  1. Which is cylcobutane?

Chemistry 2202 Unit 3 Test 1Page 1 of 8


Chemistry 2202 Unit 3 Test 1Page 1 of 8

  1. What is the name of the molecule on the right?
  2. 2-methylcyclohexene
  3. 3-methylcyclohexene
  4. 4-methylcyclohexene
  5. 5-methylcyclohexene
  1. Which describes the carbon to carbon bonds in benzene?
  2. all single bonds
  3. all double bonds
  4. alternating single and double bonds
  5. hybrid bonds involving delocalized electrons
  1. What is the name of this compound?
  1. m-diethylbenzene
  2. n-diethylbenzene
  3. o-diethylbenzene
  4. p-diethylbenzene
  1. Which hydrocarbon is saturated?
  1. Which has one double bond between two of its carbons and a total of 10 hydrogens?
  2. 2,2-dimethyl-3-pentene
  3. 2-butene
  4. 3-methyl-1-butene
  5. cyclopentene
  1. Which is NOT an isomer of ?

A. / / B. /
C. / / D. /

Chemistry 2202 Unit 3 Test 1Page 1 of 8

Chemistry 2202 Unit 3 Test 1Page 1 of 8

  1. What is the purpose of hydrocarbon cracking?
  2. It converts straight chain hydrocarbons into branched and ringed hydrocarbons.
  3. It converts long chain hydrocarbons to shorter, high demand hydrocarbons.
  4. It produces adhesives, gums and glues.
  5. It produces polymers used to make plastics.
  1. Which could be the product(s) of the reforming of nonane?

A. /
B. /
C. /
D. /

Chemistry 2202 Unit 3 Test 1Page 1 of 8

Chemistry 2202Unit 3 Test 1Page 1 of 8

Name:______Site:______Page:___of___

Chemistry 2202

Unit 3 Test 1 Answer Form

Part 1 – Multiple Choice: Circle the letter corresponding to your choice.

Chemistry 2202Unit 3 Test 1Page 1 of 8

Name:______Site:______Page:___of___

  1. ABCD
  2. ABCD
  3. ABCD
  4. ABCD
  5. ABCD
  6. ABCD
  7. ABCD
  8. ABCD
  9. ABCD
  10. ABCD
  11. ABCD
  12. ABCD
  13. ABCD
  14. ABCD
  15. ABCD
  16. ABCD
  17. ABCD
  18. ABCD

Chemistry 2202Unit 3 Test 1Page 1 of 8

Name:______Site:______Page:___of___

Part 2 – Constructed Response Items:Complete all items in the spaces provided.

{1}19.a)Draw a structural diagram for 3,3,4,4-tetramethylheptane.

{2}b)Write the molecular formula for the alkane in item 19a), and write a balanced chemical reaction showing its complete combustion.

3,3,4,4-tetramethylheptane

4(1C) + 7C = 11C

Alkane; therefore follows general formula CnH2n+2: C11H24

{2}20.Write a balanced equation, using structural diagrams, to show the addition polymerization ofpropene.

{2}21.a)Gasoline is a mixture of hydrocarbons ranging from 5 to 10carbons in size, whereas lubricating oils are15 to17 carbons long.

Sketch a structural formula for one gasoline hydrocarbon and one lubricating oilhydrocarbon.

{3}b)Using a diagram, describe how are the two consumer products in 21 a) are separated from crude oil.

Gasoline is composed of smaller molecules. It will have weaker LDF, and will have a lower boiling point. It will condense higher in the fractionating column.

Lubricating oil is composed of larger molecules with stronger LDF. These molecules will condense lower in the fractionating column

{3}22.Explain how the bonding in aromatics is different from the bonding in aliphatic hydrocarbons.

Aromatics have 1 electron from each carbon in the benzene ring that are delocalized above and below the benzene ring. Instead of being shared and localized between two carbons, the six electrons (shown in red) are shared between all six carbons in the benzene ring. / Aliphatics are hydrocarbons in which all the bonds are either single, double or triple covalent bonds. This results in 1 electron pair (single bond), 2 electron pairs (double bond) or 3 electron pairs (triple bond) being localized between the two carbon atoms that are bonded.

{2}23.Draw and name one cyclic and one noncylic isomer of C5H8.

C5H8 fits the general formula (CnH2n-2), so it could be an alkyene or a cycloalkene.

There are a fair number of possibilities for both of these: