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

Answer is : (d) It has high density

Fluid used in a thermometer must be easily visible, expands uniformly and significantly and it must be a liquid at room temperature.

So, density of mercury is not a feature for selecting mercury in clinical thermometers.