set 8 MCQ Questions & Answers Detailed Explanation

Question : 1

Following rays are used in the diagnosis of intestinal diseases

a) β-rays

b) α-rays

c) X-rays

d) γ-rays

Question : 2

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 : 3

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 : 4

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 : 5

Echo is a type of

a) neither reflected sound nor refracted sound

b) reflected sound

c) refracted sound

d) None of these

Question : 6

Consider the following statements:

1. If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is.
2. If a person under water looks at a coin above the water surface, the coin will appear to be at a higher level than it really is.

a) 2 only

b) 1 and 2

c) 1 only

d) None