21450.If average velocity of a sample of gas molecules at 300 K is 5 cm s–1, what is RMS velocity of same sample of gas molecules at the same temperature?
(Given, α : u : v = 1 : 1.224 : 1.127)
(Given, α : u : v = 1 : 1.224 : 1.127)
6.112 cm/s
4.605 cm/s
4.085 cm/s
5.430 cm/s
21452.At a certain temperature the time required for the complete diffusion of 200 mL of H2 gas is 30 minutes. The time required for the complete diffusion of 50 mL of O2 gas at the same temperature will be
60 minutes
30 minutes
45 minutes
15 minutes
21453.The most probable velocity of a gas molecule at 298 K is 300 m/s. Its RMS velocity in m s–1 is
420
245
402
367
21454.The molecular velocity of any gas is
Directly proportional to square root of temperature
Inversely proportional to the square root of temperature
Inversely proportional to absolute temperature
Directly proportional to square of temperature
21455.At 400 K temperature and 0.0821 Pressure the density of Carbon dioxide is (gm/lit)
0.01
0.11
2.5
4.4
21456.According to the kinetic theory of gases, in an ideal gas, between two successive collisions a gas molecule travels
in a wavy path
in a straight line path
with an accelerated velocity
in a circular path
21457.The ratio of rates of diffusion of gases X and Y is 1 : 5 and that of Y and Z is 1 : 6. The ratio of rates of diffusion of Z and X is
1 : 30
1 : 6
30 : 1
6 : 1
21458.The statement that is NOT correct is
Compressibility factor measures the deviation of real gas from ideal behaviour.
Van der Waals constant ‘a’ measures extent of intermolecular attractive forces for real gases.
Critical temperature is the lowest temperature at which liquefaction of a gas first occurs.
Boyle point depends on the nature of real gas.
21459.The compressibility factor (Z) of one mole of a van der Waals gas of negligible ‘a’ value is
1
bp / RT
1 + bp/RT
1 – bp/RT