STANDARD Chemistry Physical Properties Assertion Reason Question
Given below are two statements: Statement-I: The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular association in aldehydes and ketones due to dipole-dipole interactions. Statement-II: The boiling points of aldehydes and ketones are lower than the alcohols of similar molecular masses due to the absence of H-bonding. In the light of the above statements, choose the most appropriate answer from the options given below:
Both statement-I and statement-II are correct.
Both statement-I and statement-II are incorrect.
Statement-I is correct but statement-II is incorrect.
Statement-I is incorrect but statement-II is correct.
Correct Answer
Detailed Explanation
Both statements are correct. Aldehydes and ketones have higher boiling points than hydrocarbons due to dipole-dipole interactions. However, they have lower boiling points than alcohols because alcohols can form hydrogen bonds, which are stronger than dipole-dipole interactions.
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