Q.

The density of O2 (g) is maximum at :

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a

STP

b

273 K and 2 atm

c

546 K and 1 atm

d

546 K and 2 atm

answer is B.

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Detailed Solution

The ideal gas equation is PV=nRT=wmRTDensity ,P= WRTMVP=dRTMd=PMRTThus, the density of the ideal gas is directly proportional to the pressure and inversely proportional to the temperature.Thus, the density will be maximum for higher pressure and lower temperature.
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