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 : The safest temperature for keeping food fresh in a refrigerator is

(a) 8°C

(b) 0°C

(c) 4°C

(d) 10°C

The correct answers to the above question in:

Answer: (c)

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

Question : 1

The diamond appears lustrous because of

a) Total internal reflection

b) Refraction

c) Reflection

d) Scattering

Answer: (a)

Question : 2

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

Answer: (b)

Question : 3

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 : 4

The Doppler’s effect is applicable for

a) Sound waves

b) Space waves

c) Light waves

d) Both (a) and (c)

Answer: (d)

Question : 5

A metal sheet with a circular hole is heated. The hole

a) remains of the same size

b) gets larger

c) gets smaller

d) gets deformed

Answer: (b)

Question : 6

The standing wave pattern along a string of length 60 cm is shown in the above diagram. If the speed of the transverse waves on this string is 300 m/s, in which one of the following modes is the string vibrating ?

sound oscillations heat thermodynamics question answer 24

a) First overtone

b) Fundamental

c) Second overtone

d) Third overtone

Answer: (c)

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