Mercury boils at 367° However, mercury thermometers are made such that they can measure temperature upto 500°C. This is done by

filling oxygen gas at high pressure above the mercury column.

maintaining vacuum aboves mercury column in the stem of the thermometer

filling nitrogen gas at high pressure above the mercury column.

filling oxygen gas at high pressure above the mercury column.

filling nitrogen gas at low pressure above the mercury column.

Mercury boils at 367° However, mercury thermometers are made such tha

1.	Mercury boils at 367° However, mercury thermometers are made such that they can measure temperature upto 500°C. This is done by
A.	maintaining vacuum aboves mercury column in the stem of the thermometer
B.	filling nitrogen gas at high pressure above the mercury column.
C.	filling oxygen gas at high pressure above the mercury column.
D.	filling nitrogen gas at low pressure above the mercury column.
Answer» C. filling oxygen gas at high pressure above the mercury column.