Gas at a pressure P0 is contained in a vessel. If the masses of all the molecules are halved and their speeds are doubled, the resulting pressure P will be equal to

1.  4P0                                 

2.  2P0

3.  P0                                   

4.  P02

Subtopic:  Types of Velocities |
 68%
From NCERT
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Consider a gas with density ρ and c¯ as the root mean square velocity of its molecules contained in a volume. If the system moves as whole with velocity v, then the pressure exerted by the gas is

1.  13ρc¯ 2                                   

2.  13ρc+v2

3.  13ρc¯-v2                         

4.  13ρc-2-v2

Subtopic:  Types of Velocities |
 66%
From NCERT
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In kinetic theory of gases, a molecule of mass m of an ideal gas collides with a wall of vessel with velocity V. The change in the linear momentum of the molecule is

1.  2mV                           

2.  mV

3.  – mV                           

4.  Zero

Subtopic:  Kinetic Energy of an Ideal Gas |
 81%
From NCERT
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The ratio of mean kinetic energy of hydrogen and oxygen at a given temperature is

1.  1 : 16                     

2.  1 : 8

3.  1 : 4                       

4.  1 : 1

Subtopic:  Kinetic Energy of an Ideal Gas |
 69%
From NCERT
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A sealed container with negligible coefficient of volumetric expansion contains helium (a monoatomic gas). When it is heated from 300 K to 600 K, the average K.E. of helium atoms is

1. Halved                     

2. Unchanged

3. Doubled                   

4. Increased by factor 2

Subtopic:  Kinetic Energy of an Ideal Gas |
 76%
From NCERT
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The kinetic energy of translation of 20 gm of oxygen at 47°C is (molecular wt. of oxygen is 32 gm/mol and R = 8.3 J/mol/K)

1.  2490 joules                   

2.  2490 ergs

3.  830 joules                     

4.  124.5 joules

Subtopic:  Kinetic Energy of an Ideal Gas |
 75%
From NCERT
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The mean kinetic energy of a gas at 300 K is 100 J. The mean energy of the gas at 450 K is equal to

1.  100 J                             

2.  3000 J

3.  450 J                             

4.  150 J

Subtopic:  Kinetic Energy of an Ideal Gas |
 86%
From NCERT
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Read the given statements and decide which is/are correct on the basis of kinetic theory of gases

(I) Energy of one molecule at absolute temperature is zero

(II) r.m.s. speeds of different gases are same at same temperature

(III) For one gram of all ideal gas kinetic energy is same at same temperature

(IV) For one mole of all ideal gases, mean kinetic energy is same at same temperature

 

1. All are correct                         

2. I and IV are correct

3. IV is correct                           

4. None of these

Subtopic:  Kinetic Energy of an Ideal Gas |
From NCERT
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At 27°C temperature, the kinetic energy of an ideal gas is E1. If the temperature is increased to 327°C, then kinetic energy would be

1.  2E1                               

2.  12E1

3.  2E1                           

4.  12E1

Subtopic:  Kinetic Energy of an Ideal Gas |
 83%
From NCERT
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The average kinetic energy of a gas molecule at 27°C is 6.21×10-21 J. Its average kinetic energy at 227°C will be

1. 52.2×10-21 J                           

2. 5.22×10-21 J

3. 10.35×10-21 J                         

4. 11.35×10-21 J

Subtopic:  Kinetic Energy of an Ideal Gas |
 81%
From NCERT
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