Name: Unit 11 Organic Chemistry
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1 1. Which compound is a member of the same homologous series as C3H8? A) CH4 B) C4H8 C) C5H8 D) C5H10 2. Which formula represents an unsaturated hydrocarbon? 5. Which structural formula represents 2-pentyne? C) D) 3. Which formula represents 2-butene? 4. Given the structural formula: What is the total number of electrons shared in the bond between the two carbon atoms? A) 6 B) 2 C) 3 D) 4 6. Organic compounds that are essentially non-polar and exhibit weak intermolecular forces have A) low vapor pressure B) low melting points C) high boiling points D) high electrical conductivity in solution 7. In a given homologous series of hydrocarbons, the boiling point generally increases as the size of the molecules increases. The best explanation for this statement is that in larger organic molecules A) the number of covalent bonds per molecule is greater B) the molecules are more symmetrical C) more hydrogen bonding is possible D) there are greater intermolecular forces
2 8. Given the structural formulas: Which two formulas represent compounds that are isomers of each other? A) A and B B) A and C C) B and D D) C and D 9. Given the structural formula: 12. Which formula represents the product of the addition reaction between ethene and chlorine, Cl2? What is the IUPAC name of this compound? A) pentanal B) pentanol C) methyl pentanoate D) pentanoic acid 10. Which pair of compounds are alcohols? A) B) C) D) 11. What is the correct IUPAC name for A) 1,2-dichlorobutane B) 2,3-dichlorobutane C) 1,2-dichloropropane D) 2,3-dichloropropane 13. Given the equation: C2H6+ Cl2 C2H5Cl + HCl This reaction is best described as A) addition involving a saturated hydrocarbon B) addition involving an unsaturated hydrocarbon C) substitution involving a saturated hydrocarbon D) substitution involving an unsaturated hydrocarbon 14. The reaction C6H12O6 2C2H5OH + 2 CO2 is an example of A) esterification B) distillation C) fermentation D) saponification
3 15. What is the IUPAC name of the organic compound that has the formula shown below? A) 1,1-dimethylbutane B) 2-methylpentane C) hexane D) 4-methylpentane 16. Which compound is a saturated hydrocarbon? A) CH2CH2 B) CH3CH3 C) CH3CHO D) CH3CH2OH 17. Given the structural formula: The compound represented by this formula can be classified as an A) organic acid B) ether C) ester D) aldehyde 18. What is the IUPAC name of the compound with the following structural formula? A) propanone B) propanal C) butanone D) butanal 19. Hydrocarbons are compounds that contain A) carbon, only B) carbon and hydrogen, only C) carbon, hydrogen, and oxygen, only D) carbon, hydrogen, oxygen, and nitrogen, only 20. Which formula represents propyne? A) C3H4 B) C3H6 C) C5H8 D) C5H10
4 21. Base your answer to the following question on the information below. A reaction between bromine and a hydrocarbon is represented by the balanced equation below. Write the name of the homologous series to which the hydrocarbon belongs. 22. Base your answer to the following question on " the following information. The equation below represents the reaction between butanoic acid and an unidentified reactant, X. " Draw a structural formula for the unidentified reactant, X, in the equation. 23. Explain, in terms of structural formulas and molecular formulas, why these hydrocarbons are isomers of each other. 24. Base your answer to the following question on the information below. In one industrial organic reaction, C3H6 reacts with water in the presence of a catalyst. This reaction is represented by the balanced equation below. Explain, in terms of bonding, why C3H6 is classified as an unsaturated hydrocarbon. 25. In the space to the right of the reactants and arrow provided draw the structural formula for the product of the reaction shown.
5 26. Base your answer to the following question on the information below and on your knowledge of chemistry. The unique odors and flavors of many fruits are primarily due to small quantities of a certain class of organic compounds. The equation below represents the production of one of these compounds. State the class of organic compounds to which product 1 belongs.
Name: Unit 11 Organic Chemistry
1. Which compound is a member of the same homologous series as C3H8? A) CH4 B) C4H8 C) C5H8 D) C5H10 2. Which formula represents an unsaturated hydrocarbon? 5. Which structural formula represents 2-pentyne?
9. Which compound is an alcohol? A) methanol C) butane B) ethyne D) propanal
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