Two ballons are filled, one with pure He gas and other by air, repectively. If the pressure and temperature of these ballons are same then the number of molecules per unit volume is:A. more in the He filled balloonB. same in both ballonsC. more in air filled balloonD. in the ratio of 1:4

Two ballons are filled, one with pure He gas and other by air, repecti

1.	Two ballons are filled, one with pure He gas and other by air, repectively. If the pressure and temperature of these ballons are same then the number of molecules per unit volume is:A. more in the He filled balloonB. same in both ballonsC. more in air filled balloonD. in the ratio of 1:4
Answer» Correct Answer - B Ideal gas equation can be written as pV=nRT ….. (i) In this equation , n= number of moles of the gas p= pressure of the gas V = volume of the gas R= universal gas constant and T = temperature of the gas from Eq . (i) , We have , `(n)/(V)=(P)/(RT)="constant"` So , at constant pressure and temperature , both balloons will contain equal number of molecules per unit volume.

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Two ballons are filled, one with pure He gas and other by air, repectively. If the pressure and temperature of these ballons are same then the number of molecules per unit volume is:A. more in the He filled balloonB. same in both ballonsC. more in air filled balloonD. in the ratio of 1:4

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