light, heat, thermodynamics, wave motion, sound, optics & oscillations - Category wise Question and Answer Practice Test with Solutions

light, heat, thermodynamics, wave motion, sound, optics & oscillations PRACTICE TEST [16 - EXERCISES]

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set 11

set 12

set 13

set 14

set 15

set 16

Question : 16 [BPSC (Pre) 1999]

Following rays are used in the diagnosis of intestinal diseases

a) β-rays

b) α-rays

c) X-rays

d) γ-rays

Answer: (c)

Question : 17

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

Answer: (a)

γv = γp = $1/{273}$ K

E = $3/2$ RT  is the same for all ideal gases at the same temperature.

The mean free path, λ = ${kT}/{√{2πd^2p}}$; so it increases with a decrease in pressure.

Question : 18

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

Answer: (c)

Question : 19 [UPPCS (Mains) 2005]

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

Answer: (d)

Question : 20 [PCS (Pre) 2013]

For normal eyes what is the minimum distance for clear vision?

a) 20 cm

b) 15 cm

c) 10 cm

d) 25 cm

Answer: (d)

IMPORTANT general science mcq EXERCISES

set 8 Online Quiz

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1646 light thermodynamics sound optics and oscillations based general science mcq set 8 question answer pdf
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