Two non-reactive monoatomic ideal gases have their atomic masses in the ratio 2:3. The ratio of their partial pressures, when enclosed in a vessel kept at a constant temperature, is 4:3. The ratio of their densities is
8 : 9
6 : 9
1 : 2
1 : 4
A
1 : 2
B
6 : 9
C
1 : 4
D
8 : 9
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Solution
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The correct option is D 8 : 9 Sol : (D) PV=nRT=mMRT ⇒PM=ρRT ρ1ρ2=P1M1P2M2=(P1P2)×(M1M2)=43×23=89 Here ρ1 and ρ2 are the densities gases in the vessel containing the mixture.
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