A) by filling the space above mercury with oxygen at high pressure
B) by filling the space above mercury with nitrogen at low pressure
C) by filling the space above mercury with nitrogen at high pressure
D) by keeping the space above mercury as vacuum
Correct Answer: C
Solution :
In order to increase the boiling point, high pressure must be required. Hence, temperature can be raised to \[{{500}^{o}}C\] from \[{{367}^{o}}C\] by filling the space above mercury with nitrogen at high pressure.
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