1. As a reducing agent, NaBH4 donates a to a ketone or aldehyde. A) proton B) hydrogen atom C) hydride ion D) hydrogen molecule E) a sodium radical 2. Vicinal diols can be prepared by? A) oxidizing alkanes with OsO4 B) oxidizing alkenes with OsO4 C) reducing alkanes with OsO4 D) reducing alkenes with OsO4 E) oxidizing alkynes with OsO4 3. Rank the following carboxylic acid derivatives in order of decreasing reactivity toward hydrolysis (most reactive on left): A) B) C) D) A) C> A > B > D B) D > B > A > C C) B > D > A > C D) A > B > D > C E) D > B > C > A 4. The reaction of phenylmagnesium bromide with propanal (CH3CH2CH=O), followed by hydrolysis yields A) 2-phenyl-1-propanol. B) 1-phenyl-1-propanol. C) 2-phenyl-2-propanol D) 3-phenyl-1-propanol E) 1-phenyl-2-butanol