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]

set 1

set 2

set 3

set 4

set 5

set 6

set 7

set 8

set 9

set 10

set 11

set 12

set 13

set 14

set 15

set 16

Question : 11

Water has maximum density at

a) –4°C

b) 0°C

c) 32°F

d) 4°C

Discuss »

Answer: (d)

Water has maximum density at 4°C.

Question : 12 [IAS (Pre) 2013]

Consider the following phenomena.

  1. Size of the Sun at dusk
  2. Colour of the Sun at dawn
  3. Moon being visible at dawn
  4. Twinkle of stars in the sky
  5. Polestar being visible in the sky
Which of the above are optical illusions?

a) 1, 2 and 4

b) 3, 4 and 5

c) 1, 2 and 3

d) 2, 3 and 5

Discuss »

Answer: (a)

Question : 13 [CDS]

Consider the following statements:

  1. Steam at 100°C and boiling water at 100°C contain same amount of heat.
  2. Latent heat of fusion of ice is equal to the latent heat of vaporization of water.
  3. In an air-conditioner, heat is extracted from the room air at the evaporator coils and is rejected out at the condenser coils.
Which of these statements is/are correct?

a) 2 and 3

b) 1 and 2

c) Only 2

d) Only 3

Discuss »

Answer: (d)

Question : 14

The frequency of a wave travelling at a speed of 500 ms–1 is 25Hz. Its time period is

a) 25 s

b) 20 s

c) 0.05 s

d) 0.04 s

Discuss »

Answer: (d)

Question : 15

The regions of compressions and rarefractions of sound wave are·establisbed because

a) the reflected sound wave at fixed end interferes with the incident wave

b) the sound wave undergoes diffraction behind obstacles

c) the longitudinal movement of air molecules produce pressure fluctuations

d) the speed of the sound wave changes as it travels through a medium

Discuss »

Answer: (c)

IMPORTANT general science mcq EXERCISES

set 14 Online Quiz

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1652 heat wave motion sound optics oscillations based general science mcq set 14 question answer pdf
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