Q. Given below are two statements: Statements: I The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular mass because of weak molecular association in aldehydes and ketones due to dipole - dipole interactions. Statements: II: The boiling points of aldehydes and ketones are lower than the alcohols of similar molecular mass due to the absence of H-bonding. In the light of the above statements, choose the most appropriate answer from the options given below:
A) Statements I is incorrect but Statements II is correct.
B) Both Statements I and Statement II are correct.
C) Both Statements I and Statements II are incorrect.
D) Statements I is correct but Statements II is incorrect.
Explanation
[Solution] Aldehydes and ketones have dipole-dipole association (higher b.p. than hydrocarbons) but no intermolecular H-bonding (lower b.p. than alcohols). Both statements are correct. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.