Question -
A vessel contains 1 mole of O2 gas (molar mass 32) at a temperature T. The pressure of the gas is P. An identical vessel containing one mole of He gas (molar mass 4) at a temperature 2T has a pressure of
Options:
A .  P8
B .  P
C .  2P
D .  8P
Answer: Option C : C For a gas, PV=nRT. Hence (P)O2=(1mole)RTV and (P)He=(1mole)R(2T)V ∴(P)He(P)O2=2 or (P)He=2(P)O2
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