A jar has a mixture of hydrogen gases in the ratio of 1 :The ratio of mean kinetic energies of hydrogen and oxygen molecules is
  • 1 : 16
  • 1 : 4
  • 1 : 5
  • 1 : 1
The mean free path of collision  of gas molecules varies with its diameter (d) of the molescules as
  • 1/d
  • 1/d2
  • 1/d3
  • 1/d4
The r.m.s of speed of a group of 7 gas molecules having speed  ( 5,3,1,0,-1,-3,-5) m/s is
  • $\sqrt {69}$ m/s
  • 8 m/s
  • 9 m/s
  • $\sqrt {70}$ m/s
The number of degrees of freedom for a diatomic gas molecule is
  • 2
  • 3
  • 5
  • 6
Relation between Pressure P and average Kinetic energy E per unit volume of a gas is
  • P = 2E/3
  • P=E/3
  • P = 3E/2
  • P = 3E
The molar specific heat of a gas as given from the kinetic theory is 5R/If it is not specified whether it is Cp or Cv, one could conclude that the molecules of the gas
  • are definitely monoatomic
  • are definitely rigid diatomic
  • are definitely non-rigid diatomic
  • can be monoatomic or rigid diatomic
The absolute zero is the temperature at which
  • All substances exist in solid-state
  • Water freezes
  • Molecular motion ceases
  • None of these
If a gas has n degrees of freedom , then ratio of specific heats of gas is
  • $ \frac {1+n}{2}$
  • $1 + \frac {1}{n}$
  • $ 1 + \frac {n}{2}$
  • $ 1 + \frac {2}{n}$
Three perfect gasses at absolute temperatures $T_1$, $T_2$, and $T_3$ are mixed. The masses of molecules are $m_1$,$m_2$ and $m_3$ and the number of molecules of the gasses is $n_1$, $n_2$, and $n_3$ respectively then assuming no loss of energy, the final temperature of the mixture will be
  • $ \frac {T_1 + T_2 + T_3}{3}$
  • $ \frac {n_1T_1 + n_2T_2 + n_3T_3}{n_1 + n_2+n_3}$
  • $ \frac {n_1T_1^2 + n_2T_2^2 + n_3T_3^2}{n_1T_1 + n_2T_2 + n_3T_3}$
  • $ \frac {n_1^2T_1^2 + n_2^2T_2^2 + n_3^2T_3^2}{n_1T_1 + n_2T_2 + n_3T_3}$
In the following questions, a statement of assertion is followed by a statement of reason. You are required to choose the correct one out of the given four responses and mark it as (a) If both assertion and reason are true and the reason is the correct explanation of the assertion. (b) If both assertion and reason are true but the reason is not the correct explanation of the assertion. (c) If the assertion is true, but the reason is false. (d) If both assertion and reason are false. (e) If the reason is true but the assertion is false. Assertion: In the free expansion of an ideal gas, the entropy increases. Reason: Entropy increases in all-natural processes.
  • (a)
  • (b)
  • (c)
  • (d)
  • (e)
In the following questions, a statement of assertion is followed by a statement of reason. You are required to choose the correct one out of the given four responses and mark it as (a) If both assertion and reason are true and reason is the correct explanation of the assertion. (b) If both assertion and reason are true but reason is not correct explanation of the assertion. (c) If assertion is true, but reason is false. (d) If both assertion and reason are false. (e) If reason is true but assertion is false.   Assertion: Air pressure in a car tire increases during driving Reason: Absolute zero temperature is not zero energy temperature
  • (a)
  • (b)
  • (c)
  • (d)
  • (e)
In the following questions, a statement of assertion is followed by a statement of reason. You are required to choose the correct one out of the given four responses and mark it as (a) If both assertion and reason are true and reason is the correct explanation of the assertion. (b) If both assertion and reason are true but reason is not correct explanation of the assertion. (c) If assertion is true, but reason is false. (d) If both assertion and reason are false. (e) If reason is true but assertion is false.   Assertion: The root mean square  and most probable speeds of the molecules in a gas are the same Reason: The maxwell distribution for the speed to molecules  in a gas is symmetrical  
  • (a)
  • (b)
  • (c)
  • (d)
  • (e)
In the following questions, a statement of assertion is followed by a statement of reason. You are required to choose the correct one out of the given four responses and mark it as (a) If both assertion and reason are true and reason is the correct explanation of the assertion. (b) If both assertion and reason are true but reason is not correct explanation of the assertion. (c) If assertion is true, but reason is false. (d) If both assertion and reason are false. (e) If reason is true but assertion is false.   Assertion: Vibrational energy of diatomic molecule corresponding to each degree of freedom is $k_BT$. Reason: For every molecule, the vibrational degree of freedom is 2.
  • (a)
  • (b)
  • (c)
  • (d)
  • (e)
You have the following group of particles,$n_1$ represents the number of molecules with speed $v_1$?   Find the average speed
class-11-physics-kinetic-theory-of-gases-online-test-1.png
  • 4.1 m/s
  • 3.37 m/s
  • 3.17 m/s
  • 3 m/s
Find the rms speed
  • 4.1 m/s
  • 3.37 m/s
  • 3.17 m/s
  • 3 m/s
Find the most probable speed?
  • 4.1 m/s
  • 3.37 m/s
  • 3.17 m/s
  • 3 m/s
The critical volume of a gas obeying van der Waals’ equation is
  • 8a/27Rb
  • a/27b2R
  • 3b
  • a/27Rb
When you make ice cubes, the entropy of water
  • does not change
  • increase
  • decreases
  • may either increase or decrease depending on the process used.
Which of the following is not a state function?
  • Work-done in adiabatic process
  • Work done in isothermal process
  • Heat at constant pressure
  • Heat at constant volume
0 h : 0 m : 1 s

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