For a gas, the r.m.s speed at 800 K is:

(1) Four times the value at 200 K

(2) Half the value at 200 K

(3) Twice the value at 200 K

(4) Same as at 200 K

Concept Questions :-

Types of velocity
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The average kinetic energy of a helium atom at 30°C is:                                                                                           [MP PMT 2004]

(1) Less than 1 eV

(2) A few KeV

(3) 50-60 eV

(4) 13.6 eV

Concept Questions :-

Kinetic energy of gas
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The mean translational kinetic energy of a perfect gas molecule at the temperature T Kelvin is:

(1) 12kT         (2) kT             (3) 32kT            (4) 2 kT

Concept Questions :-

Kinetic energy of gas
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Choose the correct option related to the specific heat at constant volume CV -

(1) CV=12fR              (2) CV=Rγ-1

(3) CV=CPγ                (4) All of these

Concept Questions :-

Specific heat
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The curve between absolute temperature and vrms2 is:

(a)        

(b) 

(c)          

(d) 

Concept Questions :-

Types of velocity
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Five molecules of a gas have speeds, 1, 2, 3, 4 and 5 kms-1.  The value of the root mean square speed of the gas molecules is:

(1) 3 kms-1             (2) 11kms-1

(3) 12πkms-1    (4) 3.5 kms-1

Concept Questions :-

Types of velocity
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The average velocity of an ideal gas molecule is:                                                                                                                   [OJEE 2010]

(1) proportional to T

(2) proportional to T2

(3) proportional to T3

(4) zero

Concept Questions :-

Types of velocity
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For a gas, RCV=0.67.  This gas is made up of molecules which are:                                                                   [JIPMER 2001, 02]

(1) Diatomic           (2) Mixture of diatomic and polyatomic molecules

(3) Monoatomic      (4) Polyatomic

Concept Questions :-

Specific heat
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At constant temperature, on increasing the pressure of a gas by 5% its volume will decrease by:          [MP PET 2002; Kerala 2006]

(1) 5%       (2) 5.26 %         (3) 4.26 %         (4) 4.76 %

Concept Questions :-

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At what temperature, is the root mean square speedof molecules of hydrogen is twice of that at STP?A 273 KB 546 KC 819 KD 1092 K

Concept Questions :-

Types of velocity
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