The correct answer is option 3, i.e. Alcohol.
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_______ is one of the liquids commonly used in liquid-in-glass thermometers.
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Alcohol
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What is liquid-in-glass thermometers?
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- A Liquid-in-Glass Thermometer is a glass capillary tube having a liquid-filled bulb present at one end.
- This device is used for measuring temperature due to its accuracy.
- A very thin opening, called a bore, exists from the bulb and extends down the centre of the tube.
- The bulb is typically filled with either mercury or red-coloured alcohol and is free to expand and rise up into the tube when the temperature increases, and to contract and move down the tube when the temperature decreases.
- The principle used to measure temperature is that of the apparent thermal expansion of the liquid.
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