n1 mole of monoatomic gas is mixed with n2 mole of diatomic gas such that γmix=1.5, then:

1. n1=2n2

2. n2=2n1

3. n1=n2

4. n1=3n2

Subtopic:  Specific Heat |
 56%
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Molar heat capacity of the process P = aT for a monoatomic gas, 'a' being positive constant  is-

1.  72 R 

2.  52 R  

3.  32 R

4.  None of these

 

Subtopic:  Specific Heat |
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A rocket is propelled by a gas which is initially at a temperature of 4000 K. The temperature of the gas falls to 1000 K as it leaves the exhaust nozzle. The gas which will acquire the largest momentum while leaving the nozzle is:

(1) Hydrogen

(2) Helium

(3) Nitrogen

(4) Argon

Subtopic:  Types of Velocities |
From NCERT
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Maxwell's velocity distribution curve is given for two different temperatures. For the given curves-
                    

1. T1>T2
2. T1<T2
3. T1T2
4. T1=T2

Subtopic:  Maxwell Distribution Curve (OLD NCERT) |
 70%
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The variation of density (p) of gas with its absolute temperature (T) at constant pressure is best represented by the graph

1. 2.
3. 4.

Subtopic:  Ideal Gas Equation |
 78%
From NCERT
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The variation of pressure versus temperature of an ideal gas is shown in the given diagram. From this diagram, one can conclude that

                 

1.  Volume increases continuously

2.  Volume decreases continuously

3.  Volume first increases then decreases

4.  Volume first decreases, then increase

Subtopic:  Ideal Gas Equation |
 57%
From NCERT
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If P is the pressure of the gas then the KE per unit volume of the gas is:

1.  P2  

2.  P  

3.   3P2 

4.   2P

Subtopic:  Kinetic Energy of an Ideal Gas |
 80%
From NCERT
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The root mean square speed of oxygen molecules (O2) at a certain absolute temperature is v. If the temperature is doubled and oxygen gas dissociates into oxygen atom, the rms speed would be :

1.  v  

2.  2v  

3.  2v  

4.  22v

Subtopic:  Types of Velocities |
 59%
From NCERT
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A gas mixture consist of 2 moles of O2 and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total internal energy of the system is:

(1)4RT 

(2) 15RT

(3)9RT

(4)11RT

Subtopic:  Kinetic Energy of an Ideal Gas | Law of Equipartition of Energy |
 74%
From NCERT
NEET - 2017
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One mole of an ideal monatomic gas undergoes a process described by the equation PV3= constant. The heat capacity of the gas during this process is:

(1) 32R           

(2) 52R

(3) 2R             

(4) R

Subtopic:  Specific Heat |
NEET - 2016
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