Question

Mercury boils at 356C. However, mercury thermometers are made such that they can measure temperatures upto 500C. This is done by 1) maintaining vacuum above the mercury column in the stem of the thermometer 2) filling Nitrogen gas at high pressure above the mercury column 3) filling Nitrogen gas at low pressure above the mercury column 4) filling oxygen gas at high pressure above the mercury column

Answer 1

Answer:

opt (2)

Explanation:

By filling nitrogen gas above the mercury column, we are in fact increasing the boiling point of mercury. Mercury that can reach boiling point of 356degreeC, can now measure up to 500degreeC. Mercury separation in the capillary of the thermometer is filled by nitrogen gas and nitrogen being inert gas can minimize the oxidation of mercury.

Answer 2

Answer:

, mercury thermometers are made such that they can measure temperature up to 500∘C. This is done by. Solution : By filling nitrogen gas at high pressure, the boling point of mercury is increased which extend the range upto 500∘C