Questions
Mercury boils at a temperature of 367°C; however mercury thermometers are made which can measure up to 500°C. This is done by:
a
maintaining vacuum above the Hg column in the stem of the thermometer
b
filling nitrogen gas at low pressure above mercury column
c
filling nitrogen gas at high pressure above mercury column
d
filling oxygen gas at high pressure above mercury column
detailed solution
Correct option is C
if we fill nitrogen gas at a high pressure above mercury level,the boiling point of mercury is increased which can extended to the range up to 5000CTalk to our academic expert!
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