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Mercury boils at 367^(@)C. However, merc...

Mercury boils at `367^(@)C`. However, mercury thermometers are made such that they can measure temperature up to `500^(@)C`. This is done by

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In a mercury thermometer, the space above the mercury is filled with liquid nitrogen which helps in increasing the boiling point of mercury and hence, raises the upper limit of the thermometer.
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MODERN PUBLICATION-THERMAL PROPERTIES OF MATTER-CONCEPTUAL QUESTIONS
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