ACSBR 20E Alcohols Acids - Assignment

Anglo-Chinese School (Barker Road) A Methodist Institution Founded in 1886 CHEMISTRY DEPARTMENT OF SCIENCE Name: ( ) Class: SEC 4 OC: ALCOHOLS & CARBOXYLIC ACIDS – ASSIGNMENT ALEX LEE/2010 PAGE 1 OF 6 PURE/COMBINED Multiple-Choice Questions [20 Marks] TOTAL SCORE / 30 Write in your selected answer for the multiple-choice questions in the boxes provided. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1. The structure of an organic molecule is shown below. Which of the following best describes this molecule? A It is a carboxylic acid. C It is an alkene. B It is a hydrocarbon. D It is an unsaturated alcohol. 2. Which of the following statements is true of all alcohols? A All alcohols are good oxidising agents. B All alcohols burn exothermically. C All alcohols can be produced by fermentation. D All alcohols can be used in alcoholic beverages. 3. Which of the following is not a suitable use for ethanol? A used as a disinfectant C used in alcoholic beverages B used as a fuel for motor vehicles D used in the manufacture of margarine 4. Which two properties explain why ethanol is suitable for use in perfumes and deodorants? A It is a good solvent and has a low boiling point. B It is colourless and is flammable. C It is flammable and is a good solvent. D It is has a low boiling point and is flammable. C C C H C O H H H O H H

ALEX LEE/2010 PAGE 2 OF 6 5. Which of the statement correctly describes the chemical properties of alcohols? A Alcohols are able to react with solid magnesium carbonate. B Alcohols are able to decolourise acidified potassium dichromate(VI). C Alcohols have an –OH group and hence have a pH greater than 7. D Alcohols turn aqueous potassium iodide from colourless to brown. 6. Propanol can be differentiated from propane by A bubbling the combustion products through limewater. B heating with acidified potassium dichromate(VI). C reacting with aqueous sodium carbonate. D shaking with aqueous bromine. 7. Ethane, ethene, ethanol and ethanoic acid have A the same number of hydrogen atoms per molecule. B the same percentage mass of carbon. C the same products upon complete combustion. D the same reactions with aqueous bromine. 8. In the alcohol homologous series, as the number of carbon atoms increases, A the density decreases. B the melting and boiling point decreases. C the percentage mass of carbon decreases. D the solubility in water decreases. 9. Ethanol is boiled in a beaker with acidified potassium permanganate. Which of the following is the organic product formed? A ethanoic acid B ethene C ethyl ethanoate D polyethene 10. Which of the following molecules is a reducing agent? molecule X molecule Y molecule Z A X only B X, Y and Z C Y and Z only D Z only 11. When a glass of wine is left exposed for some time, it turns sour. This is because A the esters had reacted