Question

Which of the following statements are correct?

• A. The $(C-O)$ bond length is shorter in ester than in anhydride
• B. Esters have higher boiling points than ketones of comparable molecular masses
• C. The boiling points of $1^{\circ}$ amides are higher than those of $2^{\circ}$ amides
• D. $N$-Methyl acetamide exists in two eclipsed conformation structures, $E$ and $Z$ forms

Answer 1

Answer: (A), (C), (D)

Correct answer is (a) The $(C-O)$ bond length is shorter in ester than in anhydrideCorrect answer is (c) The boiling points of $1^{\circ}$ amides are higher than those of $2^{\circ}$ amidesCorrect answer is (d) $N$-Methyl acetamide exists in two eclipsed conformation structures, $E$ and $Z$ forms