NEET Chemistry States Of Matter Online Test Set B

1. The density of gas A is twice that of gas B at the same temperature. The molecular weight of gas B is thrice that of A. The ratio of pressure acting on A and B will be

2. Air contains 23% oxygen and 77% nitrogen by weight. The percentage of O₂ by volume is

3. Correct statement

4. The molecular velocities of two gases at the same temperature are u₁ and u₂ and their molar masses are m₁ and m₂ respectively. Which of the following expressions are correct?

5. At STP 16 mL of O₂ diffused through a porous partition in t seconds. What volume of CO₂ will diffuse in the same time and under the same conditions?

6. Equal mass of H₂, He and CH₄ are mixed in empty container at 300 K, when total pressure is 2.6 atm. The partial pressure of H₂ in the mixture is

7. A flask containing air (open to atmosphere) is heated from 300 K to 500 K. Then percentage of air escaped to the atmosphere is

8. 4 g argon (Atomic mass = 40) in a bulb at a temperature of T K has a pressure P atm. When the bulb was placed in hot bath at a temperature 50°C more than the first one, 0.8 g of gas had to be removed to get the original pressure. T is equal to

9. What is the correct increasing order of liquefiability of the gas?

10. A spherical balloon of 21 cm diameter is to be filled up with H₂ at NTP from a cylinder containing the gas at 20 atm at 27°C. The cylinder can hold 2.82 litre of water. The number of balloons that can be filled up

11. A graph of Maxwell distribution of molecular velocities is plotted below. Correct order of temperature

12. If saturated vapours are compressed slowly at constant temperature to half the initial volume, the vapour pressure will

13. Which of the following is correct regarding viscosity?

14. The point at which densities of a substance in gaseous as well as in liquid state are same called

15. Boyle's temperature T_b is equal toåÊ

16. The critical temperature of a gas is related to van der Waal's constants as

17. Boyle's temperature and inversion temperature are related as

18. T_c and P_c of a gas are 400 K and 41 atms. respectively. The V_c is

19. Distribution of fraction of molecules with velocity is represented in the figure. Velocity corresponding to point X is

20. The rms velocity of hydrogen is √7 times the rms velocity of nitrogen If T is the temperature of the gas then.

21. The time taken for a certain volume of gas to diffuse through a small hole was 2 min. Under similar conditions an equal volume of oxygen took 5.65 minute to pass. The molecular mass of the gas is

22. At what temperature will the total KE of 0.3 mol of He be the same as the total KE of 0.4 mol of Ar at 400 K?

23. The average velocity of an ideal gas molecule at 27°C is 0.3 m/s. The average velocity at 927°C will be

24. The temperature at which the root mean square velocity of SO₂ molecules is the same as that of O₂ at 27°C is

25. At what temperature the RMS velocity of oxygen will be same as that of methane at 27°C?

26. The total kinetic energy in joules of the molecules in 8 g of methane at 27°C is

27. If pressure of a fixed quantity of a gas is increased 4 times keeping the temperature constant, the r.m.s. velocity will be

28. What is the ratio of the average molecular kinetic energy of UF₆ to that of H₂ both at 300 K?

29. For non-zero value of force of attraction between gas molecules, gas equation will be

30. Which of the following gas always shows positive deviation from ideal gas behaviour?