Chemistry 2202 Unit 3 Test Section 1 &

Transcription

1 Chemistry 2202 Unit 2 Test 2 Section 1 & 2 Page 1 of 6 Chemistry 2202 Unit 3 Test Section 1 & Part 1 Multiple Choice: Complete using the answer form on page 4. (20 points) 1. What is the main idea in vitalism theory? a. Organic chemicals can be obtained from any source, organic or inorganic. b. Organic chemicals can only be obtained from dead organisms. c. Organic chemicals can only be obtained from living or dead organisms. d. Organic chemicals can only be obtained from living organisms. 2. Which is an organic compound? a. AgCl b. NH 4 CN c. AgOCN d. OH 3. Why do organic compound vastly outnumber inorganic compounds? a. Carbon atoms are able to form covalent bonds with hydrogen. b. Carbon atoms have a high bonding capacity. c. Carbon has a high number of lone pairs of electrons. d. Elemental carbon can undergo a large variety of chemical reactions. 4. Which is NOT a homologous series? a. CH 4, C 2 H 6, C 3 H 8 b. CH 4, C 2 H 4, C 3 H 6 c. C 2 H 4, C 3 H 6, C 4 H 8 d. C 2 H 2, C 3 H 4, C 4 H 6 5. Which is a pure hydrocarbon? a. BaCO 3 b. C 6 H 14 c. OH d. Na 2 CO 3 6. Which is a straight chain alkane with 7 carbons? a. heptane b. hexene c. octyne d. pentane

2 Chemistry 2202 Unit 2 Test 2 Section 1 & 2 Page 2 of 6 7. Which is NOT an isomer of C 4 H 8? a. CH b. CH c. d. 8. What is the IUPAC name of compound on the right? a. 2-ethyl-2,4,5-trimethylpentane b. 2-ethyl-2,4-dimethylhexane c. 3,5,5-trimethylheptane d. 3,3,5-trimethylheptane 9. Which hydrocarbon is unsaturated? a. C 4 H 10 b. C 6 H 12 c. C 8 H 18 d. C 10 H 22 CH C 10. What is the IUPAC name of the compound on the right? a. 1-methyl-1-pentene b. 5-methyl-4-pentene c. 2,3-hexene d. 2-hexene HC CH

3 Chemistry 2202 Unit 2 Test 2 Section 1 & 2 Page 3 of What is the IUPAC name for the structure on the right? H a. cis-2-butene b. cis-2-pentene c. trans-2-butene d. trans-2-pentene H 3 C C C H 12. What is the IUPAC name for the structure on the right? a. c. 1,6,6,6-tetramethyl-2-pentyne 2,2,6-trimethyl-4-hexyne b. d. 2,2-dimethyl-4-heptyne 6,6-dimethyl-3-heptyne H 3 C H 3 C C C C 13. What is the IUPAC name of the molecule on the right? a. ethylcyclopentane b. pentylcyclopropane c. propylcylclopentane d. propylcyclohexane 14. What is IUPAC the name of the molecule shown? a. 1-methyl-2-cyclopentene b. 2-methyl cyclopentane c. 3-methyl-1-cyclopentene d. methyl cyclopentane 15. What is the IUPAC name of the compound on the right? a. butylbenzene b. butylcylcohexene c. propylbenzene d. propylcyclohexene 16. What is the name of the molecule on the right? a. m-ethylmethylbenzene b. n-ethylmethylbenzene c. o-ethylmethylbenzene d. p-ethylmethylbenzene H 3 C

4 Chemistry 2202 Unit 2 Test 2 Section 1 & 2 Page 4 of Which statement is NOT consistent with the current model of bonding of benzene? a. The benzene ring is a symmetrical planar molecule. b. All carbon-carbon bonds are of equal length. c. The molecular formula is found to be C 6 H 6. d. It contains fixed double and single carbon-carbon bonds. 18. Which is the correct statement regarding fractional distillation? a. Crude oil from different sources, when distilled in a fractionating tower, will yield the same percent of gasoline b. Fractions with very low boiling points will condense lower in the tower than the fractions with high boiling points c. Substances with high boiling points will condense lower in the fractional distillation tower. d. The mixture of hydrocarbons in crude oil are converted into the various fractions (gasoline, furnace oil, etc.) by chemical reactions 19. Which coefficient balances this equation? a. 1 b. 4 c. 7 d. 10 C5H 8 + O2 5 CO2 + 4 H2O 20. Which monomer will produce the polymer below? n? H H C C n a. 1-butene b. 2-butene c. 2,3-dimethylethane d. butane

5 Chemistry 2202 Unit 3 Test Section 1 & 2 page 5 Name: Site: Part 1: For each item, circle the letter corresponding to your choice. 1. A B C D 6. A B C D 11. A B C D 16. A B C D 2. A B C D 7. A B C D 12. A B C D 17. A B C D 3. A B C D 8. A B C D 13. A B C D 18. A B C D 4. A B C D 9. A B C D 14. A B C D 19. A B C D 5. A B C D 10. A B C D 15. A B C D 20. A B C D Part 2: Constructed Response: Write your responses in the spaces provided. (15 points) 21. Explain why Wöhler s synthesis of urea, CO(NH 2 ) 2, by heating ammonium cyanate, NH 4 OCN, was a landmark event in the study of organic compounds. 2 pt 22. a. Draw and name all the isomers of C 3 H 6. 2pt b. Will these two substances have the same boiling points? Explain with reference to intermolecular forces of attraction. 2 pt

6 Chemistry 2202 Unit 3 Test Section 1 & 2 page 6 Name: Site: 23. a. Describe the composition of crude oil. 1pt b. Describe, with the use of a diagram, how C 7 H 16 and C 20 H 42 are separated in a fractional distillation tower. 3 pt c. Compare cracking reactions and reforming reactions that involve decane. (Distinguish, using decane as a reactant molecule, between the changes that could occur in molecules undergoing cracking and reforming.) 3 pt 24. Explain how the bonding in benzene differs from the single, double and triple bonds in aliphatic hydrocarbons. 2 pt