In a flask of volume V litres, 0.2 mol of oxygen, 0.4 mol of nitrogen, 0.1 mol of ammonia and 0.3 mol of helium are enclosed at 27oC. If the total pressure exerted by these non-reating gases is one atmosphere, the partial pressure exerted by nitrogen is [Kerala MEE 2001]

(1) 1 atm

(2) 0.1 atm

(3) 0.2 atm

(4) 0.4 atm

Concept Questions :-

Dalton's Law
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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 [IIT 1993]

(1) 1 : 2

(2) 1 : 1

(3) 1 : 16

(4) 15 : 16

Concept Questions :-

Dalton's Law
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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 [IIT 1993]

(1) 180 mm

(2) 360 mm

(3) 540 mm

(4) 720 mm

Concept Questions :-

Dalton's Law
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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

Concept Questions :-

Graham's Law
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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

Concept Questions :-

Graham's Law
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Density ratio of O2 andH2 is 16 : 1. The ratio of their r.m.s. velocities will be [AIIMS 2000]

(1) 4 : 1

(2) 1 : 16

(3) 1 : 4

(4) 16 : 1

Concept Questions :-

Graham's Law
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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 [CPMT 2000]

(1) 79.19 ml s–1

(2) 112.0 ml s–1

(3) 56 ml s–1

(4) 90.0 ml s–1

Concept Questions :-

Graham's Law
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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

Concept Questions :-

Graham's Law
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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

Concept Questions :-

Kinetic Theory of Gas
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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 [EAMCET 2001]

(1) 16 T

(2) 2 T

(3) 4 T

(4) 32 T

Concept Questions :-

Molecular Velocity
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