Question

Five properties of liquid mercury which is used in the thermometer

Answer 1

• It being a metal remains at liquid form at room temperature.

• has a high boiling point.
• does not stick to the walls of thermometer.
• shows uniform expansion.
• is shiny and therefore helps in giving accurate reading.

Answer 2

Answer:

1. It is very reflective, so it's easy to see and to read accurately.

2. It doesn't wet the glass, so you don't get inaccurate readings if the temperature is falling.

3. It is a metal, so it's a good conductor of heat. This means that it reacts quickly to changes of temperature.

4. It expands evenly with temperature, so a linear scale can be used with quite a high degree of accuracy.

5. There's a large range of temperature for which it is a liquid. However, it freezes at - 39 Celsius, so Mercury cannot be used below this temperature. It boils at 365 Celsius, which is high enough for most purposes.