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120 g of an ideal gas of molecular weight 40 mole–1 are confined to a volume of 20 L at 400 K. Using R=0.0821LatmK1mole1, the pressure of the gas is [Pb. CET 1996]

(1) 4.90 atm

(2) 4.92 atm

(3) 5.02 atm

(4) 4.96 atm