1. Which of the following is false about gases

2. wo gases X and Y are at same temperature and pressure. The reduced temperature of X is below unity while that of Y is above unity. Thus

3. Liquefication of gases cannot be achieved by

4. A pressure of 0.101325 bar when expressed in atmospheres represents

5. Which of the following statement is false?

6. A rubber balloon permeable to all isotopic forms of hydrogen is filled with heavy hydrogen and placed in tank of pure hydrogen. After some times the balloon will

7. The value of universal gas constant depends upon

8. At constant volume for a foxed number of gas moles the pressure of the gas increases with the rise in temp. because of

9. An ideal gas is at pressure P and temperature T in a box which has been placed in another evacuated large container. The inner box is pricked so that the gas inside it starts escaping out. What is correct?

10. The bottle of liquid ammonia is cooled before opening the seal so as to lower its

11. The vapour density a diatomic gas with homoatomic molecules is 25. The atomoc mass of a gas will be

12. Under which of the following conditions the real gases will approach the behaviour of ideal gas?

13. For ideal gas isochors refer to the graphs between

14. One litre of gas weighs 2 g at 300 K and 1 atm pressure. If the pressure is made 0.75 atm and temperature is brought down to 250 K the gas will occupy a volume of

15. The magnitude of van der Waals forces depends upon

16. Which of the following do not pertain to the postulates of kinetic theory of gases?

17. Real gases deviate from ideal behaviour because the molecules

18. Rate of diffusion of a gas is

19. For ideal gases isotherm refers to the

20. The temperature of ideal gas can be increased by

21. The state in which 99% matter of the universe exists is

22. The densities of two gases are in the ratio of 1: 16. The ratio of their rates of diffusion is

23. Which among the following samples of gases contains Avogadro number of atoms at S.T.P.?

24. The dimensions of pressure are some as that of

25. When ideal gas undergoes unstrained expansion no cooling occurs because the molecules

26. 1000 ml of a gas A at 600 torr and 500 ml of gas B at 800 torr are placed in a 2L flask. The final pressure in atmosphere is

27. The average distance traveled by the molecule between successive collisions is called

28. If volume of two moles of ideal gas at 540 K is 44.8 L then its pressure will be

29. A vessel containing gas at a pressure of 60 cm of Hg was connected to arm A of open end manometer. The atmospheric pressure was recorded as 74 cm of Hg. If mercury in arm A stands at 84.5 cm height the mercury in arm will stand at

30. Hydrogen diffuses 6 times faster than gas X. The molecular mass for X will be

31. Four soldered ampules of equal volumes contain nitrogen ozone chlorine and helium at ordinary conditions. The largest number of atoms will be found in the ampule containing

32. Two flasks of equal capacity contain argon and chlorine gases respectively at room temperature. What is true about them?

33. The behaviour of a real gas approaches ideal behaviour at

34. 1 g of Zn was treated with each of excess of sulphuric acid and excess of NaOH separately. The ratio of the volumes of hydrogen evolved is

35. The temperature at which real gas exhibits ideal behaviour over a wide range of pressure is called

36. Critical temperature of the gas refers to the temperature

37. 10 g of each of the following gases were taken HF HCl HBr HI under similar conditions then

38. Which of the following pairs of gas will diffuse at the same rate under similar conditions?

39. The value of critical volumes of four gases A B C D are 0.025 L 0.312 L 0.245 L and respectively. The gas with larger value of van der Waal constant b is

40. Same gas is confined to two containers A and B. The pressure volume and temperature (K) of gas in A are three times as compared to that in B. If the mass of gas in A is x g then the mass in B would be

41. Each of the four species hydrogen sulphide (I) protium oxide (II) hydrogen chloride (III) and chlorine (IV) at S.T.P. have been put into four separate vessel each of one litre capacity. The largest number of molecules are present in

42. The vapour density of gas X is 4 times that of Y. If molecular mass of X is

43. The distance between the centres of the molecules at the closest approach is called

44. Three flasks of 2 L capacity were separately filled with argon oxygen and ozone respectively under similar conditions. The ratio of number of atoms in the flasks is

45. Which of the following will not change the r.m.s. if the gas molecules?

46. Which among the following contains Avogadro number of molecules?

47. Real gases deviate from ideal behaviour because their molecules

48. Three different gases X Y Z of molecular masses 32 64 71 were enclosed in a vessel at constant temperature till equilibrium is reached. Which of the following statement is/are true?

49. The van der Waal constant b is equal to

50. Pick up correct answer among the following about Boyles temperature

51. The mixture of three gases X (density 0.09) Y (density 0.178) and Z (density 0.42) is enclosed in a closed vessel at constant temperature. When equilibrium is establisted the

52. 500 ml of gas A at 1000 torr and 1000 ml of gas at 800 torr ate placed in an empty container of 2 L capacity. The pressure in the container would be

53. The rate of diffusion of methane at certain temperature is 2 times that of gas X. The molecular mass of X is

54. Which of the following is not the postulate of the kinetic theory of gases?

55. A balloon containing methane is pricked with a sharp needle and quickly plunged into a tank of hydrogen at same pressure. After sometime the balloon will

56. A real gas which obeys van der Waals equation will approach ideal behaviour if