Which liquid is used to measure temperature in thermometers?

Water

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Alcohol

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Mercury

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Oil

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Solution

The correct options are
B Alcohol
C Mercury
Mercury is a liquid at room temperature. It has a high coefficient of expansion and a low freezing point(-39) making it suitable for temperature measurements. Alcohol has a lower freezing point(-130) than mercury and hence is suited for use in thermometers. They are sensitive to temperature changes.

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(b) What is used to find the area of an irregular surface?

(d) What is the unit of temperature?

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