In the case of hydrogen and helium the van der Waals' forces are-

1. Strong                 

2. Very strong

3. Weak                   

4. None of the above

Subtopic:  van der Waal’s Correction |
 61%
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With the increase of pressure, the mean free path:

1. decreases                             

2. increases

3. becomes zero                       

4. remains the same

Subtopic:  Kinetic Theory of Gas |
 57%
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The compressibility factor of an ideal gas is:

1. zero                         

2. infinite

3. 1                               

4. -1

Subtopic:  Compressibility Factor |
 76%
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The correct value of the gas constant 'R' is close to 

1. 0.082 L atm K

2. 0.082 L atm K-1 mol-1

3. 0.082 L atm-1 K mol-1

4. 0.082 L-1 atm-1 K mol

Subtopic:  Ideal Gas Law |
 84%
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The partial pressure of a dry gas is:

1. less than that of wet gas

2. greater than that of wet gas

3. equal to that of wet gas

4. none of the above

Subtopic:  Dalton's Law |
 60%
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The number of molecules present in 1 mL of gas or vapor at STP is:

1. called Loschmidt's number

2. equal to 2.617 x 1019 per mL

3. both (1) and (2)

4. none of the above

Subtopic:  Gas Laws |
 78%
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 Air at sea level is dense. This is a practical application of:

1. Boyle's law                         

2. Charles' law

3. Avogadro's law                   

4. Dalton's law

Subtopic:  Gas Laws |
 52%
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In van der Waals' equation of state of the gas, the constant 'b' is a measure of:

1. Intermolecular collisions per unit volume

2. Intermolecular attraction

3. Volume occupied by molecules

4. Intermolecular repulsions

Subtopic:  van der Waal’s Correction |
 73%
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For 1 mole of gas, the average kinetic energy is given as E. The urms of gas is :

1. [2E/M]1/2

2. [3E/M]1/2

3. [2E/3M]1/2

4. [3E/2M]1/2

Subtopic:  Molecular Velocity |
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600 cc of a gas at a pressure of 750 mm is compressed to 500 cc. Taking the temperature to remain constant, the increase in pressure is:                                         

1. 150 mm                       

2. 250 mm

3. 350 mm                      

4. 450 mm

Subtopic:  Gas Laws |
 74%
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