Question:
Which from following compounds has lowest boiling point?
Which from following compounds has lowest boiling point?
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Boiling Point $\propto$ Molecular Mass (for similar functional groups).
Updated On: Jun 19, 2026
- Ethanol
- Propanol
- Butanol
- Methanol
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The Correct Option is D
Solution and Explanation
Step 1: Concept
For a homologous series, boiling point increases with molecular mass.
Step 2: Meaning
Higher surface area and Van der Waals forces lead to higher boiling points.
Step 3: Analysis
- Methanal ($C_{1}$), Ethanol ($C_{2}$), Propanol ($C_{3}$), Butanol ($C_{4}$). - Methanol has the smallest carbon chain and lowest molecular weight.
Step 4: Conclusion
Hence, Methanol has the lowest boiling point. Final Answer: (D)
For a homologous series, boiling point increases with molecular mass.
Step 2: Meaning
Higher surface area and Van der Waals forces lead to higher boiling points.
Step 3: Analysis
- Methanal ($C_{1}$), Ethanol ($C_{2}$), Propanol ($C_{3}$), Butanol ($C_{4}$). - Methanol has the smallest carbon chain and lowest molecular weight.
Step 4: Conclusion
Hence, Methanol has the lowest boiling point. Final Answer: (D)
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