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Mercury boils at 367^(@)C. However, merc...

Mercury boils at `367^(@)C`. However, mercury thermometers are made such that they can measure temperature up to `500^(@)C`. This is done by

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

Text Solution

Verified by Experts

The correct Answer is:
B
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