set 15 MCQ Questions & Answers Detailed Explanation

MOST IMPORTANT general science mcq - 16 EXERCISES

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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq

Questions : When a piece of ice floating in a glass of water melts, the level of water will

(a) Rise

(b) Remain same

(c) Fall

(d) Fall or rise depends on the temperature of water

The correct answers to the above question in:

Answer: (b)

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Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers

Question : 1

The walls of the ball, built for music concerts should

a) Transmit sound

b) Reflect sound

c) Amplify sound

d) Absorb sound

Answer: (d)

Question : 2

Consider the following parts of spectra

  1. Visible
  2. Infrared
  3. Ultraviolet
  4. Microwave
Which one of the following is the correct sequence in which their wavelengths increase ?

a) 4 – 1 – 2 – 3

b) 4 – 3 – 1 – 2

c) 3 – 2 – 1 – 4

d) 3 – 1 – 2 – 4

Answer: (d)

Question : 3

When beams of red, blue and green lights fall on the same spot, the colour of the light becomes

a) Yellow

b) Red

c) Violet

d) White

Answer: (d)

Question : 4

The diamond appears lustrous because of

a) Total internal reflection

b) Refraction

c) Reflection

d) Scattering

Answer: (a)

Question : 5

The safest temperature for keeping food fresh in a refrigerator is

a) 8°C

b) 0°C

c) 4°C

d) 10°C

Answer: (c)

Question : 6

The Doppler’s effect is applicable for

a) Sound waves

b) Space waves

c) Light waves

d) Both (a) and (c)

Answer: (d)

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