Question:
Which among the following compound has highest boiling point?
Which among the following compound has highest boiling point?
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Compare hydrogen bonding strength and molar mass of the four compounds.
Updated On: Nov 13, 2026
- \(n-C_4H_9OH\)
- \(n-C_4H_9NH_2\)
- \(C_2H_5COOH\)
- \(C_2H_5CH(CH_3)_2\)
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Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
Boiling point rises with stronger intermolecular hydrogen bonding and larger molar mass.
Step 2: Compare
Carboxylic acids form stable dimers through two hydrogen bonds, giving the strongest association.
Alcohols and amines also hydrogen bond, but alcohol bonds are stronger than amine bonds. The alkane has none.
Step 3: Order
\(\text{C}_2\text{H}_5\text{COOH}\ (141^{\circ}\text{C}) > n\text{-C}_4\text{H}_9\text{OH}\ (118^{\circ}\text{C}) > n\text{-C}_4\text{H}_9\text{NH}_2\ (78^{\circ}\text{C}) > \) alkane.
Step 4: Match
The highest boiling point is that of propanoic acid, option (C).
Final Answer:
Propanoic acid has the highest boiling point. \[ \boxed{\text{(C) }\text{C}_2\text{H}_5\text{COOH}} \]
Boiling point rises with stronger intermolecular hydrogen bonding and larger molar mass.
Step 2: Compare
Carboxylic acids form stable dimers through two hydrogen bonds, giving the strongest association.
Alcohols and amines also hydrogen bond, but alcohol bonds are stronger than amine bonds. The alkane has none.
Step 3: Order
\(\text{C}_2\text{H}_5\text{COOH}\ (141^{\circ}\text{C}) > n\text{-C}_4\text{H}_9\text{OH}\ (118^{\circ}\text{C}) > n\text{-C}_4\text{H}_9\text{NH}_2\ (78^{\circ}\text{C}) > \) alkane.
Step 4: Match
The highest boiling point is that of propanoic acid, option (C).
Final Answer:
Propanoic acid has the highest boiling point. \[ \boxed{\text{(C) }\text{C}_2\text{H}_5\text{COOH}} \]
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