3.2 g of oxygen (At. wt. = 16) and 0.2 g of hydrogen (At. wt. = 1) are placed in a 1.12 litre flask at 0°C. The total pressure of the gas mixture will be [CBSE PMT 1992]

(1) 1 atm

(2) 4 atm

(3) 3 atm

(4) 2 atm

Concept Questions :-

Ideal Gas Law
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The density of methane at 2.0 atmosphere pressure and 27°C is [BHU 1994]

(1) 0.13 gL–1

(2) 0.26 gL–1

(3) 1.30 gL–1

(4) 2.60 gL–1

Concept Questions :-

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The volume of 0.0168 mol of O2 obtained by decomposition of KClO3 and collected by displacement of water is 428 ml at a pressure of 754 mm Hg at 25°C. The pressure of water vapour at 25°C is [UPSEAT 1996]

(1) 18 mm Hg

(2) 20 mm Hg

(3) 22 mm Hg

(4) 24 mm Hg

Concept Questions :-

Ideal Gas Law
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What will be the partial pressure of H2 in a flask containing 2 g of H2, 14 g of N2 and 16 g of O2 [Assam JET 1992]

(1) 1/2 the total pressure

(2) 1/3 the total pressure

(3) 1/4 the total pressure

(4) 1/16 the total pressure

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

(1) 1/3

(2) 1/2

(3) 2/3

(4) 1/3×273/298  

Concept Questions :-

Dalton's Law
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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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