NEET UG Physics Kinetic Theory of Gases MCQs

11. 0₂ gas is filled in a vessel. If pressure is doubled, temperature becomes four times, how many times its density will become.
(A) 4 (B) 1/ 4 (C) 2 (D)  1/2

12. At a given volume and temperature the pressure of a gas
(A) Varies inversely as the square of its mass (B) Varies inversely as its mass
(C) is independent of its mass (D) Varies linearly as its mass

13. If pressure of a gas contained in a closed vessel is increased by 0.4% when heated by 1°C the initial temperature must be.
(A) 250° C (B) 25° C (C) 250 K (D) 2500 K

14. To decrease the volume of a gas by 5% at constant temperature the pressure should be
(A) Incseased by 5.26% (B) Decreased by 5.26%
(C) Decreased by 11% (D) Increased by 11%

15. A gas at the temperature 250 K is contained in a closed vessel. If the gas is heated through 1 K, then the percentage increase in its pressurse will be
(A) 0.4% (B) 0.1 % (C) 0.8% (D) 0.2%

16. The product of the pressure and volume of an ideal gas is
(A) A constant
(B) Directly proportional to its temperature.
(C) Inversely proportional to its temperature.
(D) Approx. equal to the universal gas constant.

48. The ratio of mean kinetic energy of hydrogen and oxygen at a given temperature is
(A) 1:8 (B) 1:4 (C) 1:16 (D) 1:1

49. The ratio of mean kinetic energy of hydrogen and nitrogen at temperature 300 K and 450 K respectively is
(A) 2:3 (B) 3:2 (C) 4:9 (D) 2:2

50. Pressure of an ideal gas is increased by keeping temperature constant what is the effect on kinetic energy of molecules.
(A) Decrease (B) Increase
(C) No change (D) Can`t be determined

51. A sealed container with negligible co-efficient of volumetric expansion contains helium (a monoatomic gas) when it is heated from 200 K to 600 K, the averagy K.E. of helium atom is
(A) Halved (B) Doubled (C) Unchanged (D) Increased by factor √2

52. The mean kinetic energy of a gas at 300 K is 100J. mean energy of the gas at 450 K is equal to
(A) 100 J (B) 150 J (C) 3000 J (D) 450 J 

53. At what temperature is the kinetic energy of a gas molecule double that of its value at 27°C
(A) 540 C (B) 1080 C (C) 3270 C (D) 3000 C