Question:
Molal boiling point elevation is the least for the solvent
Molal boiling point elevation is the least for the solvent
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Water's $K_b$ is 0.52 K kg/mol; Benzene's is 2.53 K kg/mol.
Updated On: Apr 27, 2026
- water
- ethanol
- benzene
- carbon tetrachloride
- cyclohexane
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The Correct Option is A
Solution and Explanation
Step 1: Concept
Molal boiling point elevation constant ($K_b$) is a property of the solvent.
Step 2: Meaning
Water has a very high heat of vaporization due to hydrogen bonding.
Step 3: Analysis
$K_b$ is inversely proportional to the latent heat of vaporization. Water has $K_b \approx 0.52$, which is lower than most organic solvents.
Step 4: Conclusion
Hence, correct answer is water.
Final Answer: (A)
Molal boiling point elevation constant ($K_b$) is a property of the solvent.
Step 2: Meaning
Water has a very high heat of vaporization due to hydrogen bonding.
Step 3: Analysis
$K_b$ is inversely proportional to the latent heat of vaporization. Water has $K_b \approx 0.52$, which is lower than most organic solvents.
Step 4: Conclusion
Hence, correct answer is water.
Final Answer: (A)
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