ACSBR 20F Alcohols Acids (Extensions) - Assignment

Anglo-Chinese School (Barker Road) A Methodist Institution Founded in 1886 CHEMISTRY DEPARTMENT OF SCIENCE Name: ( ) Class: SEC 4 OC: ALCOHOLS & CARBOXYLIC ACIDS (EXTENSIONS) – ASSIGNMENT ALEX LEE/2010 PAGE 1 OF 8 PURE 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. Three chemical reactions are shown below: Reaction I: C3H8O + C3H6O2 ⎯→ C6H12O2 + H2O Reaction II: C6H12 + HCl ⎯→ C6H13Cl Reaction III: C6H6 + Br2 ⎯→ C6H5Br + HBr Which of the following best describes the three reactions? Reaction I Reaction II Reaction III A condensation addition substitution B condensation substitution elimination C photosynthesis addition substitution D photosynthesis substitution elimination 2. When organic compounds undergo a condensation reaction, A a single product is formed. B two organic molecules combine to for a larger molecule. C water is added to the structure of an organic molecule. D water vapour turns into liquid water. 3. What is the name of the molecule below? A ethyl ethanoate C propyl ethanoate B ethyl propanoate D propyl propanoate C C OH H C C C H H O H H H H H H H

ALEX LEE/2010 PAGE 2 OF 8 4. A sample of butanol was heated under reflux with methanoic acid, using concentrated sulfuric acid as a catalyst. A sweet-smelling product was obtained. What is the name and chemical formula of this product? name chemical formula A butyl methanoate CH3COOC3H7 B butyl methanoate HCOOC4H9 C methyl butanoate CH3COOC3H7 D methyl butanoate HCOOC4H9 5. Two aqueous samples of ethanoic acid and carbonic acid have been mixed up. Which of the following tests will enable us to identify the two solutions? A adding a few drops of phenolphthalein B adding a strip of zinc metal C heating under reflux with acidified potassium dichromate(VI) D warming with ethanol and concentrated sulfuric acid 6. What do propanol, propanoic acid and propyl propanoate have in common? A they have the same combustion products B they have the same melting and boiling points C they have the same number of carbon atoms D they have the same solubility in water 7. Which of the following most accurately describes the variation across esters? A The larger the molecular size, the lower the melting point. B The larger the molecular size, the higher the percentage mass of oxygen. C The larger the molecular size, the lesser the number of isomers. D The larger the molecular size, the lower the solubility in water. 8. An isomer of ethyl methanoate is able to decolourise both aqueous bromine and acidified potassium permanganate. Which compound could this be? A C B D 9. All of the following molecules are isomers except A butanoic acid B butyl butanoate C ethyl ethanoate D methyl propanoate C C