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One of the two vessels of same capacity is filled with oxygen and other is with helium of same mass. Both gases are at same temperature. The ration of pressure of these gases is 

a
Po2PHe=18
b
Po2PHe=14
c
Po2PHe=41
d
Po2PHe=81

detailed solution

Correct option is B

V=constant ; T = Constant ; M = Constant We know that PV=μRTPO2V=mMO2RT            (1) PHeV=mMHeRT          (2) PO2VPHeV=MHeMO2 PO2PHe=416 PO2:PHe=1:4

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