set 8 MCQ Questions & Answers Detailed Explanation

Question : 1

From the following statements, concerning ideal gas at any given temperature T, select the correct ones:

1. The coefficient of volume expansion at constant pressure is the same for all ideal gases
2. The average translational kinetic energy per molecule of oxygen gas is 3KT (K being Boltzmann constant)
3. In a gaseous mixture, the average translational kinetic energy of the molecules of each component is the same
4. The mean free path of molecules increases with the decrease in pressure

a) 1, 3 and 4

b) 3 and 4

c) 1 and 2

d) 1, 2 and 3

Question : 2

Suppose a tunnel is dug along a diameter of the earth. A particle is dropped from a point, a distance h directly above the tunnel, the motion of the particle is

a) parabolic

b) simple harmonic

c) oscillatory

d) non-periodic

Question : 3

The wavelength extension of visible light is

a) Between 300-800 nm

b) Between 250-850 nm

c) Between 200-900 nm

d) Between 390-780 nm

Question : 4

Figure given above shows the part of a long string in which transverse waves are produced. Which pair of points is in phase?

a) B and J

b) A and E

c) D and J

d) C and G

Question : 5

The time taken to reach the Sunlight up to the surface of Earth is approximately

a) 8.5 minutes

b) 4.8 sec

c) 4.2 sec

d) 3.6 hours

Question : 6

Echo is a type of

a) neither reflected sound nor refracted sound

b) reflected sound

c) refracted sound

d) None of these