ICSE Class 7 Answered
Give four reasons for using mercury in a thermometer.
Asked by Topperlearning User | 14 May, 2015, 12:53: PM
Expert Answer
Mercury is used as a thermometric liquid because:
- It has a lower freezing point (-39°C) and a high boiling point (35°C). Hence it can be used over a wide range of temperature.
- It is shiny liquid metal, hence can be easily seen through the glass of the thermometer tube.
- It has a fairly large expansion for a small change in temperature.
- It does not stick to the glass tube.
Answered by | 14 May, 2015, 02:53: PM