Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change ?
Correct answer: B. Mercury
- A. Water
- B. Mercury
- C. Methyl alcohol
- D. Carbon-tetrachloride
Explanation
Among the listed liquids, mercury has the smallest volumetric expansion coefficient under ordinary thermometer conditions. Alcohol and carbon tetrachloride expand more, while water also shows comparatively greater expansion near room temperature.
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