Question

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

• A. The coefficient of the thermal expansion is large
• B. It is shiny
• C. It is a liquid at room temperature
• D. It has high density.

Answer 1

The correct option is D It has high density.

Mercury is used in thermometer as it has a high coefficient of expansion so even the smallest change in temperature can be observed, it is shiny so that we can see the level of mercury clearly and it is liquid for a wide range of temperature. But, high density of mercury is not the reason for its use in clinical thermometers.

Hence, OPTION : D.