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Q.

120 g of an ideal gas of molecular weight 40 is confined to a volume of 20 litre at 400 K, then the pressure of gas is

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a

490 atm

b

4.92 atm

c

2236 atm

d

22.4 atm

answer is B.

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Detailed Solution

P=nRTV

P=3×0.082  ×40020    P=4.92   atm

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120 g of an ideal gas of molecular weight 40 is confined to a volume of 20 litre at 400 K, then the pressure of gas is