وزارة التربية والتعليم الحلقة الثالثة- مدرسة االتحاد 2020- 2019 العام الدراسي Name:……………………………………………………………………………………… Time: 40 minutes Class:…………………………………………………………………………………………. CHEMISTRY Organic chemistry Revision worksheet-1 GRADE 12 General Duration: 40 minutes Atomic structure Electrons in an atom 1|Page وزارة التربية والتعليم الحلقة الثالثة- مدرسة االتحاد 2020- 2019 العام الدراسي 10. How many carbon atoms do most common monosaccharides have? A1 B 2to3 C 5or6 D 9or10 11. Organic compounds formed by replacing hydrogen of the hydrocarbon by other elements are called…… A Saturated hydrocarbon B Unsaturated hydrocarbon C substituted hydrocarbon D aromatic compounds 12. How would you describe a benzene ring? A rare B stable C unstable D saturated 13. What are the small units that make up polymers called? A monomers B plastics C isomers D carbohydrates 14. What type of compound is hemoglobin? A carbohydrate B nucleic acid C lipid D protein 15. What type of compounds form the DNA molecule? A amino acids B polymers C nucleotides D carbohydrates 16. Glucose and fructose both have the formula C6H12O6. What are such compounds called? A amino acids B isomers C alcohols D polymers 17. If a carbohydrate has 16 oxygen atoms, how many hydrogen atoms does it have? A4 B 16 C8 D 32 18. What is the name of the given compound? A Butane B Propane C octane D Heptane C octane D Heptane 19. Which of the following hydrocarbon is present in gasoline? A Butane B Propane 20. Identify the hydrocarbon represented by the given space-filling model? A Butane 2|Page B Propane C octane D Heptane وزارة التربية والتعليم الحلقة الثالثة- مدرسة االتحاد 2020- 2019 العام الدراسي 21. Which of the following organic compound used for welding? A Benzene B Propanol C acetylene D Heptane 22. Structures of some hydrocarbon has given below. Identify the unsaturated hydrocarbon. Compound 1 A Compound 1&2 Compound 2 B Compound 1&3 Compound 3 C Compound 2&3 D Compound 2only 23. Which of the following compound used as insecticide? A Naphthalene B Propane C hexane D Heptane C Propane D Butane 24. What is the name of the compound given below? A cyclopropane B Cyclobutane 25. Which one of the following is an aromatic compound? A B C D 26. Which of the following isomer of pentane has highest boiling point? A 3|Page B C D وزارة التربية والتعليم الحلقة الثالثة- مدرسة االتحاد 2020- 2019 العام الدراسي 27. The main function of DNA is to store a cell’s A. excess fat. B. energy reserves. C. genetic information. D. phosphate groups. 28. The instructions in a DNA molecule are carried in the form of a specific sequence of A. hydrogen bonds. B. sugars. C. phosphate groups. D. nitrogen bases. 29. The major function of carbohydrates in living organisms is as a source of A. nitrogen. B. hydrogen. C. information. D. energy. 30. Complex carbohydrates are known as A. disaccharides. B. polysaccharides. C. monosaccharides. D. simple sugars. 31. Starch, cellulose, and glycogen are all made from monomers of A amylase. B. sucrose. C. lactose. D. glucose. 32. An alcohol is an organic compound in which a hydrogen atom of a hydrocarbon has been replaced by A. a hydroxyl group. B. an oxygen atom. C. an NH2 group. D. a COOH group. 33. Which of the following suffixes is used in naming alcohols? A. -al B. -oic C. -ol D. -ane 34. The alcohol produced commercially in largest quantity is A. methanol. B. isopropyl. C. ether. D. ethanol. B. ionic. C. very slightly polar. D. moderately polar. 35. Alcohol molecules are generally A. nonpolar. 36. The alcohol produced by yeasts is A. methanol. B. ethanol. C. isopropanol. D. cyclohexanol. B. ethanol. C. isopropanol. D. butanol. 37. The simplest alcohol is A. methanol. 38. What is the molecular formula of benzene? A. C6H6 B. C6H12 C. C6H14 39. Which of the following is the best way to represent the structure of benzene? 4|Page D. C12H12 40. Which of the following is an substituted hydrocarbon 2020- 2019 العام الدراسي A. methanol. B. methane C. propane وزارة التربية والتعليم الحلقة الثالثة- مدرسة االتحاد D. butane For each item in Column A, write the letter of the matching item in Column B. Column A (……………) 1 . An organic molecule that has an amino functional group and a carboxyl functional group Column B a. denaturation (……………) 2. A chain of two or more amino acids linked together (……………) 3. The process in which a protein’s natural three dimensional structure is disrupted b. protein c. peptide bond (……………) 4 An organic polymer made of many amino acids linked together in a specific way d. amino acid (……………)5. The amide bond that joins two amino acids e. peptide 1. Name the process shown below……………………………………….. 2. In this process fractions are separated based on which physical property? ………………………………………………………………………………………………………….. 3. Name the fractions and uses …………………………………………… ………………………………………….. ……………………………………………. …………………………………………….. 5|Page 2020- 2019 العام الدراسي وزارة التربية والتعليم …………………………………………….. الحلقة الثالثة- مدرسة االتحاد ………………………………………………… For each item in Column A, write the letter of the matching item in Column B. Column A (Polymer) (……………) 1 Polyethylene Column B (Uses) a. fabric, rope (……………) 2. Polypropylene b. pipes, hoses, house siding (……………) 3. Polystyrene c. foam, waterproof coatings, shoe parts (……………) 4 Polyurethane d. foam packing , disposable food containers , CD cases (……………)5. Polyvinyl chloride e.glues carpets high-performance outdoor clothing (……………) 6. Polyester f. plastic bags, plastic bottles In the space at the left, write the word or phrase in parentheses that correctly completes the statement. 1._________ (organic, inorganic) are most compounds that contain the element carbon. 2. Amino acids combine to form large organic polymers known as(protein, glucose) _________. 3. _________(DNA, Lipids) is the nucleic acid that contains your genetic information. 4. A(n) _________ (aromatic, organic) is a compound containing the benzene-ring structure. 5. Sugars and starches are part of the group of organic compounds called (carbohydrate, proteins) _________. 6. Fats and oils are part of the group of organic compounds called (lipids, proteins) _________. 7. _________ (isomers, aromatic) are compounds with identical chemical formulas but different structures. 8. ____________(Petroleum, Natural gas) is a mixture of alkanes, aromatic hydrocarbons, and organic compounds containing sulfur or nitrogen atoms. 9. The boiling of petroleum and collection of its components is called (sedimentation, fractional distillation)___________________ 10. Ethanol combine with butanoic acid to form an ester complete the following 6|Page وزارة التربية والتعليم مدرسة االتحاد -الحلقة الثالثة ………………………………………………… + Ethanol العام الدراسي 2020- 2019 Butanoic acid 7|Page