Chem Alcohol and Organic Acids AfL

Secondary 4 Express Chemistry – Alcohol and Organic Acids - 1 - Name: _______________________ Date: _________________ Class: _____________________ Section A: Multiple Choice Questions 1 Which of the following is the general formula of an organic acid? A CnH2n + 2CO2H B C nH2n + 1CO2H C CnH2n - 1CO2H D C nH2nOn 2 Which of the following is the general formula of an alcohol? A CnH2n + 2OH B C nH2n + 1OH C CnH2n - 1OH D C nH2nO 3 The structural formulae of three compounds X, Y and Z are shown below. X Y Z H H H H H H H H H H C C C O H H C C C H H C O C C H H H H H O H H H H H Which compounds are isomers? A X and Y only B X and Z only C X, Y and Z D Y and Z only 4 What is the same for ethanol, ethanoic acid and ethyl ethanoate? A the elements in each compound B the empirical formula of each compound C the number of carbon atoms in one molecule of each compound D the number of oxygen atoms in one molecule of each compound

Secondary 4 Express Chemistry – Alcohol and Organic Acids - 2 - 5 Ethanoic acid can be produced from glucose as follows. Stage I Stage II Glucose Ethanol Ethanoic Acid Which terms are used to describe these two stages? Stage I Stage II A cracking oxidation B fermentation oxidation C fermentation addition D oxidation fermentation 6 What are the empirical and molecular formulas of ethanoic acid? empirical formula molecular formula A CH2O C2H4O2 B C2H4O C2H4O C C2H6O C2H6O D C2H4O2 CH2O 7 The diagram shows the structure of a compound Q. O O H O C H H C O H H C C C C H