JEE 2020 Physics: Kinetic Theory of Gases Quiz (12.07.2019) for JEE & BITSAT Exams

Question 1

Using equipartition of energy, the specific heat (in

) of aluminum at room temperature can be estimated to be (atomic weight of aluminium = 27)

Question 2

A gas molecule of mass M at the surface of the Earth has kinetic energy equivalent to 0 °C. If it were to go up straight without colliding with any other molecules, how high it would rise? Assume that the height attained is much less than the radius of the earth. (k_B is Boltzmann constant)

Question 3

Which of the following shows the correct relationship between the pressure ‘P’ and density

of an ideal gas at constant temperature?

Question 4

In an ideal gas at temperature T, the average force that a molecule applies on the walls of a closed container depends on T as T^q. A good estimate for q is:

Question 5

The rms velocity of molecules of a gas at temperature T is v_rms. Then the root mean square of the component of velocity in any one particular direction will be –

Question 6

Ice starts forming in the lake with water at 0 °C and when the atmospheric temperature is –10 °C. If the time is taken for 1 cm of ice be 7 hours, then the time taken for the thickness of ice to change from 1 cm to 2 cm is –

Question 7

Which of the following quantities is zero on an average for the molecules of an ideal gas in equilibrium?

Question 8

The average translational kinetic energy per molecule of an ideal gas at 0 °C (k =1.38 × 10^–23 J/K) is –

Question 9

An ideal gas at 17 °C has a pressure of 760 mm of Hg. The gas is compressed at constant temperature until its volume becomes halved. The final pressure of the gas will be –

Question 10

n molecules of an ideal gas are enclosed in cubical box at temperature T and pressure P. If the number of molecules in the box is tripled then new temperature and pressure become T ´ and P ´ respectively, but the total energy of gas system remains unchanged, then -