Maxwell's velocity distribution curve is given for two different temperature. For the given curves.

(1) T1>T2

(2) T1<T2

(3) T1T2

(4) T1=T2

Concept Questions :-

Maxwell distribution curve
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The mass of 1 liter of He under a pressure 2 atmosphere and temperature 27° C is:

1.  0.16 g

2.  0.32 g

3.  0.48 g

5.  0.64 g

 

Concept Questions :-

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

(1) n1=2n2

(2) n2=2n1

(3) n1=n2

(4) n1=3n2

Concept Questions :-

Specific heat
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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

 

Concept Questions :-

Specific heat
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Two chambers containin m1g and m2g of a gas at pressure P1 and P2 respectively are put in contact with each other. If temperature remains constant, the common pressure reached will be 

1.  P1P2m1 + m2P2m1 + m2P1 

2.  m1 + m2P2m1 + m2P1 

3.  P1P2P2m1 + m2P1 

4.  P1P2m1 + m2

 

Concept Questions :-

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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

Concept Questions :-

Types of velocity
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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

Concept Questions :-

Kinetic energy of gas
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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

Concept Questions :-

Types of velocity
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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:

(a)4RT 

(b) 15RT

(c)9RT

(d)11RT

Concept Questions :-

Kinetic energy of gas
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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:

(a) 32R            (b) 52R

(c) 2R              (d) R

Concept Questions :-

Specific heat
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