In water-saturated air, the mole fraction of water vapor is 0.02. If the total pressure of the saturated air is 1.2 atm, the partial pressure of dry air is-

1. 1.17 atm

2. 1.76 atm

3. 1.27 atm

4.  0.98 atm

Subtopic:  Dalton's Law |
 63%
From NCERT
NEET - 2019
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The volume occupied by 1.8 g of water vapour at 374 oC and 1 bar pressure will be -

[Use R=0.083 bar LK-1 mol-1]

1. 96.66 L

2. 55.87 L

3. 3.10 L

4. 5.31 L

Subtopic:  Ideal Gas Law |
 74%
From NCERT
NEET - 2019
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A gas at 350 K and 15 bar has a molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is:

1. Z<1 and repulsive forces are dominant.
2. Z>1 and attractive forces are dominant.
3. Z>1 and repulsive forces are dominant.
4. Z<1 and attractive forces are dominant.

Subtopic:  Compressibility Factor |
 58%
From NCERT
NEET - 2019
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If a gas expands at a constant temperature, it indicates that:

1. Kinetic energy of the molecules decreases

2. The pressure of the gas increases

3. The kinetic energy of the molecules remains the same

4. The number of molecules of gas increases

Subtopic:  Kinetic Theory of Gas |
 66%
From NCERT
AIPMT - 2008
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A gaseous mixture was prepared by taking equal moles of CO and N2. If the total pressure of the mixture was found to be 1 atmosphere, then the partial pressure of the nitrogen (N2) in the mixture is:

1.  0.8 atm
2.  0.9 atm
3.  1 atm
4.  0.5 atm

Subtopic:  Dalton's Law |
 83%
From NCERT
AIPMT - 2011
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Maximum deviation from ideal gas is expected from:
1. N2 (g)
2. CH4 (g)
3. NH3 (g)
4. H2 (g)
Subtopic:  Compressibility Factor |
 71%
From NCERT
AIPMT - 2013
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Equal masses of H2, O2 and CH4 have been taken in a container of volume V at temperature 27 ºC in identical conditions. The ratio of the volumes of gases H2:O2 : CH4 would be:

1. 8:16:1
2. 16:8:1
3. 16:1:2
4. 8:1:2

Subtopic:  Gas Laws |
 75%
AIPMT - 2014
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A gas such as carbon monoxide would be most likely to obey the ideal gas law at?
1. High temperature and low pressure
2. Low temperature and high pressure
3. High temperature and high pressure
4. Low temperature and low pressure

Subtopic:  Kinetic Theory of Gas |
 78%
From NCERT
NEET - 2015
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The correction factor 'a' for the ideal gas equation corresponds to:
1. density of the gas molecules
2. volume of the gas molecules
3. electric field present between the gas molecules
4. forces of attraction between the gas molecules

Subtopic:  van der Waal’s Correction |
 85%
From NCERT
NEET - 2018
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If van der Waals constant "a" for NH3, H2 and CO2 are respectively 4.17, 0.244, 1.36 and 3.59, then which one of the following gases is most easily liquefied?

1. NH3
2. H2
3. O2
4. CO2

Subtopic:  Liquefaction of Gases & Liquid |
 81%
From NCERT
NEET - 2018
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