Equal weights of ethane and hydrogen are mixed in an empty container at 25°C. The fraction of the total pressure exerted by hydrogen is- 

1. 1 : 2

2. 1 : 1

3. 1 : 16

4. 15 : 16

Subtopic:  Dalton's Law |
 78%
From NCERT
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A gaseous mixture contains 56 g of N2, 44 g of CO2 and 16 g of CH4. The total pressure of the mixture is 720 mm Hg. The partial pressure of CH4 is-

1. 180 mm

2. 360 mm

3. 540 mm

4. 720 mm

Subtopic:  Dalton's Law |
 81%
From NCERT
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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

Subtopic:  Graham's Law |
 72%
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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

Subtopic:  Graham's Law |
 71%
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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

Subtopic:  Graham's Law |
 77%
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The rate of diffusion of a gas having molecular weight just double of nitrogen gas is 56 mls–1. The rate of diffusion of nitrogen will be

(1) 79.19 ml s–1

(2) 112.0 ml s–1

(3) 56 ml s–1

(4) 90.0 ml s–1

Subtopic:  Graham's Law |
 68%
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50 ml of gas A diffuse through a membrane in the same time as 40 ml of a gas B under identical pressure-temperature conditions. If the molecular weight of A is 64, that of B would be [CBSE PMT 1992]

(1) 100

(2) 250

(3) 200

(4) 80

Subtopic:  Graham's Law |
 75%
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The kinetic energy for 14 grams of nitrogen gas at 127°C is nearly (mol. mass of nitrogen = 28 and gas constant = 8.31JK–1mol–1) 

(1) 1.0 J

(2) 4.15 J

(3) 2493 J

(4) 3.3 J

Subtopic:  Kinetic Theory of Gas |
 75%
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The rms velocity of CO2 at a temperature T (in kelvin) is x cms–1. At what temperature (in kelvin) the rms velocity of nitrous oxide would be 4x cms–1

(1) 16 T

(2) 2 T

(3) 4 T

(4) 32 T

Subtopic:  Molecular Velocity |
 71%
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The rms velocity of an ideal gas at 27°C is 0.3 ms–1. Its rms velocity at 927°C (in ms–1) is [IIT 1996; EAMCET 1991]

(1) 3.0

(2) 2.4

(3) 0.9

(4) 0.6

Subtopic:  Molecular Velocity |
 75%
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