Properties Of Solids And Liquids Question 524
Question: Mercury boils at 367°C. However, mercury thermometers are made such that they can measure temperature up to 500°C. This is done by [CPMT 2004]
Options:
A) Maintaining vacuum above mercury column in the stem of the thermometer
B) Filling nitrogen gas at high pressure above the mercury column
C) Filling nitrogen gas at low pressure above the mercury level
D) Filling oxygen gas at high pressure above the mercury column
Show Answer
Answer:
Correct Answer: B
Solution:
By filling nitrogen gas at high pressure, the boiling point of mercury is increased which extend the range upto 500°C.
