List of top Physics Questions on Kinetic molecular theory of gases

The average kinetic energy of a gas molecule is

One litre of oxygen at a pressure of $1 \,atm$ and two litres of nitrogen at a pressure of $0.5\, atm$, are introduced into a vessel of volume $1\, L$. If there is no change in temperature, the final pressure of the mixture of gas (in atm) is

Oxygen and hydrogen are at the same temperature $ T $ . The ratio of the mean kinetic energy of oxygen molecules to that of the hydrogen molecules will be

Which of the following is true in the case of an adiabatic process, where $\gamma = C_{p} / C_{v} $ ?

The degrees of freedom of a molecule of a triatomic gas are

If average velocity becomes $4$ times then what will be the effect on rms velocity at that temperature?

If average velocity becomes $4$ times then t-hat will be the effect on rms velocity at that Temperature?

Two perfect gases at absolute temperatures $T_1$ and $ T_2$ are mixed. There is no loss of energy. The temperature of mixture of masses of molecules are $ m_1$ and $ m_2$ and the number of molecules in the gases are $n_1 $ and $ n_2 $ respectively, is

The kinetic energy of 4 moles of nitrogen gas at $ \text{127}{{\,}^{\text{o}}}\text{C} $ is ...... cals. $ \text{(R= 2 cal mo}{{\text{l}}^{-1}}{{\text{K}}^{-1}}\text{)} $

At constant volume, temperature is increased. Then:

The average kinetic energy of a gas molecules at $27^{\circ} C$ is $6.21 \times 10^{-21} J$. Its average kinetic energy at $227^{\circ}C$ will be

If the kinetic energy of one mole of an ideal gas is given as $ E=\frac{3}{2}RT $ (where 7? is the universal gas constant and T is the absolute temperature of the gas), the molar specific heat at constant pressure will be given as

The number of degrees of freedom for each atom of a monatomic gas is

Three closed vessels A, B and C at the same temperature T and contain gases which obey the Maxwellian distribution of velocities. Vessel A contains only $O_2$, B only N$_2$ and C a mixture of equal quantities of $O_2$ and N$_2$. If the average speed of the 0 2 molecules in vessel A is $v_1$,, that of the N$_2$ molecules in vessel B is v$_2$, the average speed of the $O_2$ molecules in vessel C is where, M is the mass of an oxygen molecule

Find net kinetic energy (maximum possible) associated with 20 diatomic molecules (Here k_B is Boltzmann constant and T is absolute temperature of diatomic gas).

"The rate of loss of heat $-dQ/dt$ of the body is directly proportional to the temperature difference $\Delta T = (T_2 - T_1)$ of the body and surroundings". This statement is

The $r_+ / r_-$ ratio of ZnS is 0.402. Pick out the false statements of the following

The figure below shows the plot of $\frac{pV}{nT}$ versus p for oxygen gas at two different temperatures. Read the following statements concerning the above curves (i) The dotted line corresponds to the 'ideal' gas behaviou (ii) $T_1 > T_2$ (iii) The value of $\frac{pV}{nT}$ at the point where the curves meet on the y-axis is the same for all gases. Which of the above statements is true?

The emitter of a transistor is doped the heaviest because it :

The emissive power of a perfectly black body is equal to

The emissive power of a surface depends upon

The temperature of the gas consisting of rigid diatomic molecules is T = 300K. Calculate the angular root mean square velocity of a rotating moelcule if its moment of inertia is equal to $I = 2 .1 \times 10^{-39} g\,cm^2$.

The temperature of a substance increases by $27^{\circ} \, C$. On the Kelvin scale this increase is equal to

The temperature at which the average speed ofthe gas molecules is double to that at atemperature of 27 $^\circ$C is