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NEET 2019
Exam
NEET
Year
2019
Subject
Physics
Chapter
Chapter

NEET 2019 · Physics · Chapter

Mercury is often used in clinical thermometers. Which one of the...

Mercury is often used in clinical thermometers. Which one of the following properties of mercury is not a reason for this?

Options

  1. AThe coefficient of the thermal expansion is large.
  2. BIt is shiny.
  3. CIt is liquid at room temperature.
  4. DIt has high density compared to water.

Correct answer

D. It has high density compared to water.

Step-by-step solution

Mercury is used in thermometers because it is sensitive to temperature changes. Mercury has a noticeable expansion when there is increase in temperature. Since mercury has this quality of high coefficient of expansion and as it can be captured in a glass medium mercury is used in thermometers. Density is not much taken into consideration because the volume is less the weight automatically is less, however density of mercury is less than water.

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