Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury?
Options:
A . 250
B . 350
C . 550
D . 700
Answer: Option C NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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