Question:
Identify the correct decreasing order of boiling points for different organic compounds from following.
Identify the correct decreasing order of boiling points for different organic compounds from following.
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Boiling point depends on the strength of hydrogen bonding, which is strongest in carboxylic acids because of dimer formation.
Updated On: Nov 13, 2026
- Carboxylic acids \(>\) Amines \(>\) Alcohols
- Carboxylic acids \(>\) Alcohols \(>\) Amines
- Amines \(>\) Alcohols \(>\) Carboxylic acids
- Alcohols \(>\) Amines \(>\) Carboxylic acids
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
Compounds with stronger intermolecular hydrogen bonding have higher boiling points.
Step 2: Carboxylic acids
They form very strong hydrogen-bonded dimers, giving the highest boiling points.
Step 3: Alcohols and amines
Hydrogen bonds in alcohols (O-H...O) are stronger than in amines (N-H...N) because oxygen is more electronegative than nitrogen.
Step 4: Result
So the order is carboxylic acids > alcohols > amines.
Final Answer:
The correct order is carboxylic acids, then alcohols, then amines. \[ \boxed{\text{(B) }\text{Carboxylic acids}>\text{Alcohols}>\text{Amines}} \]
Compounds with stronger intermolecular hydrogen bonding have higher boiling points.
Step 2: Carboxylic acids
They form very strong hydrogen-bonded dimers, giving the highest boiling points.
Step 3: Alcohols and amines
Hydrogen bonds in alcohols (O-H...O) are stronger than in amines (N-H...N) because oxygen is more electronegative than nitrogen.
Step 4: Result
So the order is carboxylic acids > alcohols > amines.
Final Answer:
The correct order is carboxylic acids, then alcohols, then amines. \[ \boxed{\text{(B) }\text{Carboxylic acids}>\text{Alcohols}>\text{Amines}} \]
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