NEET 2022 Chemistry Boiling Points 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:
Statement I is correct but Statement II is incorrect.
Statement I is incorrect but Statement II is correct.
Both Statement I and Statement II are correct.
Both Statement I and Statement II are incorrect.
Correct Answer
Detailed Explanation
Statement I is correct because aldehydes and ketones have dipole-dipole interactions, which are stronger than van der Waals forces in hydrocarbons. Statement II is incorrect because alcohols have hydrogen bonding, which is stronger than dipole-dipole interactions.
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