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Assertion: The boiling points of alcohol...

Assertion: The boiling points of alcohols are higher than those of hydrocarbons of comparable molecular mass.
Reason Alcohols show intramolecular hydrogen bonding.

A

Assertion and reason both are correct statements and reason is correct explanation for assertion.

B

Assertion and reason both are correct statements but reason is not correct explanation for assertion.

C

Assertion is correct statement but reason is wrong statement.

D

Assertion is wrong statement but reason is correct statement.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze the assertion and reason provided: **Assertion**: The boiling points of alcohols are higher than those of hydrocarbons of comparable molecular mass. **Reason**: Alcohols show intramolecular hydrogen bonding. ### Step-by-Step Solution: 1. **Understanding Boiling Points**: - Boiling point is influenced by the types of intermolecular forces present in a substance. Alcohols have hydroxyl (-OH) groups that can form hydrogen bonds, which are stronger than the van der Waals forces present in hydrocarbons. 2. **Comparing Alcohols and Hydrocarbons**: - When comparing an alcohol (ROH) to a hydrocarbon (RH) of similar molecular mass, alcohols will have higher boiling points due to the presence of hydrogen bonding. Hydrocarbons primarily exhibit weaker van der Waals forces. 3. **Intermolecular vs. Intramolecular Hydrogen Bonding**: - The reason states that alcohols show intramolecular hydrogen bonding. However, in the context of boiling points, it is the intermolecular hydrogen bonding that is significant. Intramolecular hydrogen bonding occurs within a single molecule and does not contribute to the boiling point. 4. **Conclusion**: - The assertion is correct: alcohols do have higher boiling points than hydrocarbons of comparable molecular mass due to hydrogen bonding. - The reason is incorrect: alcohols primarily exhibit intermolecular hydrogen bonding, not intramolecular hydrogen bonding. 5. **Final Answer**: - The correct option is C: Assertion is correct, but the reason is incorrect.
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