The values of vander waals constant ‘a’ for the gases O2, N2NH3 and CH4 are 1.36, 1.39, 4.17 and 2.253 lit2 atom mol-2 respectively. The gas which can most easily be liquefied is-

(A) O2                                 

(B) N2

(C) NH3                              

(D) CH4

Subtopic:  van der Waal’s Correction |
 84%
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

At low pressure, the vander waals equation is written as :

(1) Z=1-aRTV                                 

(2) Z=1-RTVa

(3) Z=1+aRTV                                 

(4) Z=1+RTVa

Subtopic:  van der Waal’s Correction |
 72%
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X ml of H2 gas effuses through a hole in a container in 5 seconds. The time taken for the effusion of the same volume of the gas specified below under ideal condition is

(1) 10 seconds : He                          

(2) 20 seconds : O2

(3) 25 seconds : CO                          

(4) 55 seconds : CO2

Subtopic:  Graham's Law |
 73%
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The valves X and Y are opened simultaneously. The white fumes of NH4Cl will first form at :

  

(1) A                                                 

(2) B

(3) C                                                 

(4) A, B and C simultaneously

Subtopic:  Graham's Law |
 67%
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A gas mixture consists of 2 moles of oxygen and 4 moles of a argon at temperature T. Neglecting all vibrational modes, the total internal energy of the system is –

(1) 4RT                         

(2) 5RT

(3) 15RT                       

(4) 11RT

Subtopic:  Kinetic Theory of Gas |
 68%
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Given reaction : Cs + H2Og  COg + H2g. Calculate the volume at STP from 48 gm of carbon and excess H2O-

(A) 179.2 lit.                           

(B) 89.6 lit.

(C) 44.8 lit.                             

(D) 22.4 lit.

Subtopic:  Ideal Gas Law |
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Two gases occupy two containers A and B the gas in A, of volume 0.10 m3, exerts a pressure of 1.40 MPa and that in B of volume 0.15 m3 exerts a pressure 0.7 MPa. The two containers are united by a tube of negligible volume and the gases are allowed to intermingle. Then if the temperature remains constant, the final pressure in the container will be (in MPa)

(1) 0.70                               

(2) 0.98

(3) 1.40                               

(4) 210

Subtopic:  Ideal Gas Law |
 76%
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The average molecular weight of air is 28.8 g mol1. At 20ºC, the pressure of air at a height of 6 km is half of that at the sea level. Assuming that air contains minute quantities of hydrogen, at what height the partial pressure of hydrogen would be one fourth of the partial pressure at the sea level ? The temperature may be assumed to be the same.

(1) 172.8 km                           

(2) 4.8 km

(3) 86.4 km                             

(4) 9.6 km

Subtopic:  Ideal Gas Law |
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2.3 grams of a mixture of NO2 and N2O4 have a pressure of 0.82 atm at temperature, T K and volume, V litres. If VT=1300, calculate PNO2. Assume that all the NO2 was converted into N2O4.

1. 0.52 atm                             
2. 0.38 atm

3. 0.19 atm                             

4. 0.41 atm

Subtopic:  Dalton's Law |
From NCERT
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An evacuated glass vessel weighs 50.0 g when empty, 148.0 g when filled with a liquid of density 0.98 g mL1 and 50.5 g when filled with an ideal gas at 760 mm Hg at 300 K. Determine the molar mass of the gas.

1. 113 g mol1                              

2. 132 g mol1

3. 123 g mol1                              

4. 145 g mol1

Subtopic:  Ideal Gas Law |
 63%
From NCERT
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To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh