In which case rate of diffusion is highest if all are present in the same container at the same temerature:

1. 4g H₂

2. 32g O₂

3. 22g CO₂

4. 56g N₂

The rate of diffusion of two gases A and B is in the ratio of 1:4 and the B and C in the ratio 1:3 the rate of diffusion of C with respect to A is 

1. 1/12

2. 12

3. 3

4. 4

A sample of air contains only N₂, O₂ and H₂O. It is saturated with water vapours and the total pressure of 640 torr. The vapoure pressure of water is 40 torr and the molar ratio of N₂:O₂ is 3:1. The partial pressure of N₂ in the sample in 

1. 480 torr

2. 600 torr

3. 525 torr

4. 450 torr

20 L of SO₂ diffuses through a porous partition in 60s. Volume of O₂ diffuse under similar condition in 30s will be:-

1. 12.14 L

2. 14.14 L

3. 18.14 L

4. 28.14 L

A gas diffuses four time quickly as oxygen. The molecular weight of gas is:

1. 2

2. 4

3. 8

4. 16

Rate of diffusion of LPG (a mixture of n-butane and propane) is 1.25 times of SO₃. Hence, mass fraction of n-butane in LPG is

1. 0.75

2. 0.25

3. 0.50

4. 0.67

A certain gas effuses out of two different vessels A and B. A has a circular orifice while B has a square orifice of length equal to the radius of the orifice of vessel A. The ratio of rate of diffusion of the gas from vessel A to that from vessel B is

(1) π : 1

(2) 1 : π

(3) 1 : 1

(4) 3 : 2

The time taken for a certain volume of a gas ‘X’ to diffuse through a small hole is 2 minutes. It takes 5.65 minutes for oxygen to diffuse under the similar conditions. The molecular weight of ‘X’ is [NCERT 1990]

(1) 8

(2) 4

(3) 16

(4) 32

The rate of diffusion of methane at a given temperature is twice that of gas X. The molecular weight of X is 

(1) 64.0

(2) 32.0

(3) 4.0

(4) 8.0

Density ratio of O₂ and H₂ is 16 : 1. The ratio of their r.m.s. velocities will be- 

1. 4 : 1

2. 1 : 16

3. 1 : 4

4. 16 : 1