Answer to Question #230617 in Organic Chemistry for Kay

Question

36. Which of the following statements is INCORRECT?

(1) Propanal has a lower boiling point than propanol because propanol is more polar and the dipole-dipole attractive forces between the molecules are stronger.

(2) Propanone is soluble in water because the carbonyl oxygen atom of propanone can form hydrogen bonds with the protons of the water molecule.

(3) Butan-2-one has a lower boiling point than propan-2-one because of the larger alkyl groups bonded to the carbonyl carbon atom increases the degree of bonding between molecules.

(4) Acetone is more soluble in water than butan-2-one because the larger alkyl groups bonded to the carbonyl carbon atom reduces the extent of intermolecular hydrogen bonding with the protons of the water molecule.

Answer 1

(3) Butan-2-one has a lower boiling point than propan-2-one because of the larger alkyl groups bonded to the carbonyl carbon atom increases the degree of bonding between molecules.