27. The bond angles about the carbon atom in the formaldehyde molecule, H2C=O, are about: (A) 120° (B) 60° (C) 109° (D) 180° (E) 90°

33. Rank the following compounds according to increasing solubility in water. I. CH3–CH2–CH2–CH3 II. CH3–CH2–O–CH2–CH3 III. CH3–CH2–OH IV. CH3–OH (A) I < III < IV < II (B) I < II < IV < III (C) III < IV < II < I (D) I < II < III < IV (E) None of these (A-D) is correct.