31.  When a gas is heated from 298K to 323K at a constant pressure of 1 atm its volume is

32.  At and 760 torr, the sample of air contains 20% & 80% gaseous mixture, find the density of the air (Molarmass = 32 g/mol , = 28 g/mole R =0.082 )

33.  The ratio of velocities of diffusion of gas A and B is 1 : 4, if the ratio of their masses in a mixture is 2:3, calculate the ratio of their mole fractions (BIT 1990)

34.  Under same conditions of temperature and pressure the volumes of 14g and 36g of are related as :

35.  Equal masses of Hydrogen and oxygen gases are placed in a closed container, at a pressure of 3.4 atm. The contribution of hydrogen gas to the total pressure is

36.  The kinetic energy of 4.0 moles of gas at is

37.  The critical temperature of is higher than because (IIT 1997)

38.  The compressibility factor of an ideal gas is

39.  A 10 L cylinder of nitrogen at 4.0 atm pressure and developed a leak. When the leak was repaired 2.36 atm of nitrogen remained in the cylinder at . How many grams of nitrogen escaped?

40.  Calculate percentage of by weight in which has vapour density of 36.