organic chemistry quiz 14: Carboxylic Acids and phenols

#1. (3) The boiling points of carboxylic acids are higher than that of the corresponding alcohol

(a)Because each acid molecule is linked to another molecule by 2 pi bonds while each alcohol molecule is linked with another molecule by one hydrogen bond

(b)Because each acid molecule is linked to another molecule by one hydrogen bonds while each alcohol molecule is linked with another molecule by 2 hydrogen bond

(c)Because each acid molecule is linked to another molecule by 2 hydrogen bonds while each alcohol molecule is linked with another molecule by one hydrogen bond

(d)no correct answer

#2. (4) Acetic acid (pure 100%) is called glacial acetic acid ?Why?

(a)Because it freezes at (-16 c) forming solid substance looks like ice

(a)Because it freezes at 16 c forming solid substance looks like ice

(a)Because it freezes at (0 c ) forming solid substance looks like ice

(a)Because it freezes at (1 c) forming solid substance looks like ice

#3. (5) Sodium benzoate (0.15%) is used as a preservative substance for food

(a)Because it prevents the growth of bacteria in food

(b)Because it kills bacteria in food

(c) a and b

(d)n o correct answer

organic chemistry quiz 14: Carboxylic Acids and phenols

Results

#1. (3) The boiling points of carboxylic acids are higher than that of the corresponding alcohol

#2. (4) Acetic acid (pure 100%) is called glacial acetic acid ?Why?

#3. (5) Sodium benzoate (0.15%) is used as a preservative substance for food