I. Multiple Choice-Answer on the provided scantron form. Use the following choic

Question

I. Multiple Choice-Answer on the provided scantron form. Use the following choices for questions 1-4: ?? A. B. H C. 1. Which compound is the strongest acid? 2. Which compound is an ester? 3. Which compound is an unstable reaction intermediate? 4. Which compound is the easiest to oxidize? 5. Which of the following is the strongest acid? A. B. C. CO2H ?? CO2H CO2H 6. Which of the following works best to convert an ester to an aldehyde? B. DIBAH A. LAH C. MCPBA D. PCC 7. Which of the following is most resistant to acidic hydrolysis? A. methyl formate B. ethyl acetate C. propanamide D. acetyl chloride

Explanation / Answer

(1) D is the strongest acid because the carboxylate anion formed as result of deprotonation is resonace stablized.

(2) A is the ester.

(3) C is the most unstable intermediate.

(4) C can be oxidised very easily to ester

(5) D is the strongest acid because aldehyde groups at para postion withdraws the electron density from the ring making the deprotonation step easier.

(6) B DIBAL converts ester to aldehyde

(7) C propanamide

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