Minute depression of freezing point of a liquid solvent on addition of a solid solute can be best measured by a________________?
Correct answer: C. Beckman thermometer
- A. Mercury thermometer
- B. Dilatometer
- C. Beckman thermometer
- D. Bimetallic thermometer
Explanation
A Beckmann thermometer is designed to detect very small temperature differences, making it suitable for measuring freezing-point depression. Ordinary mercury thermometers lack the required sensitivity.
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