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A closed vessel contains equal number of...

A closed vessel contains equal number of molecules of `N_2` and `O_2` at a total pressure of 650 mm. If `N_2` is completely removed the pressure will

A

drop to 650/3

B

drop to 650/2

C

remain unchanged

D

become `650 xx 2`

Text Solution

Verified by Experts

The correct Answer is:
B
Equal number of molecules means equal number of moles i.e., equal mole fraction since partial pressure `prop` mole fraction.
`:. P_(N_2) = p_(O_2) or p_(O_2) = (650)/(2) mm`
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