An ideal gas cannot be liquified because                                          

1. its critical temperature is always above 0°C

2. its molecules are relatively smaller in size

3. it solidifies before becoming a liquid

4. forces operating between its molecules are negligible

Subtopic:  Ideal Gas Law |
 71%
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 The compressibility factor for H2 and He is usually:

1. >1                                     

2. =1

3. <1                                     

4. either of these

Subtopic:  Compressibility Factor |
 67%
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Boyle's law is applicable in :

1. Isobaric process

2. Isochoric process

3. Isothermal process

4. Adiabatic process

Subtopic:  Gas Laws |
 84%
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The temperature of the gas is raised from 27°C to 927°C the root mean square velocity is        

1. 92727 times of the earlier value

2. same as before

3. halved

4. doubled

Subtopic:  Molecular Velocity |
 58%
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At lower temperature, all gases except H2 and He show:

1. Negative deviation

2. Positive deviation

3. Positive and negative deviation

4. None of the above

Subtopic:  van der Waal’s Correction |
 64%
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500 mL of nitrogen at 27°C are cooled to -5°C at the same pressure. The new volume becomes-      

1. 326.32 mL                     

2. 446.66 mL

3. 546.32 mL                     

4. 771.56 mL

Subtopic:  Gas Laws |
 82%
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A gas cannot be liquefied if:

1. Forces of attraction are low under ordinary conditions

2. Forces of attraction are high under ordinary conditions

3. Forces of attraction are zero under ordinary conditions

4. Forces of attraction are either high or low under ordinary conditions

Subtopic:  Liquefaction of Gases & Liquid |
 57%
From NCERT
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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%
From NCERT
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