A flask is partially evecuated to 400 torr pressure of air. A small amount of benzene is introduced into the flask in order that some liwquid will rem
A flask is partially evecuated to 400 torr pressure of air. A small amount of benzene is introduced into the flask in order that some liwquid will remain after equilibrium has been established. The vapour pressure of at `25^(@)C` is 200 torr. What is the total pressure in the flask at equilibrium at `25^(@)C` ?
A. 120 torr
B. 510 torr
C. 620 torr
D. 480 torr
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Correct Answer - c
Since the temperature `(25^(@)C)` os constant the total vapour pressure of the equilibrum mixture= 400+220=620 torr.
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