Organic chemistry test bank (part 1)

Organic chemistry test bank (part 1) 1. para-dichlorobenzene is used as "mothballs." This compound can also be named: A) 1,2-dichlorobenzene B) 1,3-dichlorobenzene C) 2,4-dichlorobenzene D) 1,4-dichlorobenzene Answer: D 2. All of the following are isomers of ethyl butanoate except: A) propyl propanoate B) 2-ethyl butanoic acid C) hexanoic acid D) butyl propanoate Answer: D 3. To differentiate between 2-methyl-2-pentanol and 2-methyl-3-pentanol which one of the following processes will be used: A) Alkaline hydrolysis B) Oxidation C) Halogenation D) Acidic hydrolysis Answer: B 4. To have cis and trans isomers, the compound must have: A) sp bonded carbon atoms B) sp3 bonded carbon atoms C) sp2 bonded carbon atoms D) sp or sp3 bonded carbon atoms Answer: C 5. The combination of simplest member of phenols with the first member of aliphatic acids gives: A) isomer of benzoic acid B) phenyl acetate C) methyl benzoate D) phenyl ethanoate Answer: A 6. The dry distillation of sodium propanoate then chlorination the product in direct sun light using two moles of chlorine gives: A) 2,2 di-chloro ethane and hydrogen chloride B) Tetra chloro ethane and hydrogen chloride C) 1,2 di-chloro ethane and hydrogen chloride D) 1,1 di-chloro ethane and hydrogen chloride Answer: D 7. The name for CH3CHBrCHCICH2CH3 is: A) dibromotrichloropropane B) dibromotrichloropentane C) 2-bromo, 3-chloropentane D) 2,3-bromochloropentane Answer: C 8. A chemist is trying to find the identity of a compound. She knows that the compound has a molecular weight of 180 g/mol, and also that it consists of 40% carbon, 6.67% hydrogen, and 53.3% oxygen by mass. What are the empirical and molecular formulas, respectively, for this compound? A) CH2O and C6H12O6 B) C6H12O6 and CH2O C) CHO and C6H12O6 D) It is impossible to tell without more information E) CH2O and C3H6O3 Answer: A 9. Which of the following does not come under the organic addition reaction? A) Halogenation B) Hydrohalogenation C) Hydration D) Dehydration Answer: D 10. An organic compound A reacts with sodium metal and forms B. On heating with conc. H2SO4. A gives diethyl ether. What are A and B? A) C4H9OH and C4H9ONa B) CH3OH and CH3ONa C) C2H5OH and C2H5ONa D) C3H7OH and CH3ONa Answer: C 11. Calcium carbide on reaction with water gives: A) Methane B) Ethane C) propane D) Acetylene Answer: D 12. Name the process associated with acylation of benzene. A) Friedel craft reaction B) Wurtz reaction C) Wurtz fitting reaction D) Debey Huckel reaction Answer: A 13. Liquid hydrocarbon is converted into gaseous hydrocarbon by A) Oxidation B) Hydrolysis C) Cracking D) Distillation Answer: C 14. Chlorination of alkanes is an example of A) Radical B) Elimination C) Free radical D) Addition Answer: C 15. Identify the smallest alkane which can form a ring structure (cycloalkane)? A) Cyclomethane B) Methane C) Cyclopropane D) Propane Answer: C