Which of the labeled hydrogen atoms in the following structure is the most acidic? O O O O O - 235 4 2 -CHCHCOH 3 4 5 What is the major organic product of the following aldol addition? 2 I. II. III. V OH OH OH CH- OH H IV. V. OH CH Which of the labeled hydrogen atoms in the following structure is the most acidic? HOOOOO 1 1 2 3 4 5 H 2 I -CHCHCH3 3 4 5 Which of the following compounds does not have an alpha hydrogen? I. II. OC -CH III. H-C-H IV All of these IV. fo CH3 0 CHC -CH CH3