set 2 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 cooling by a desert cooler is based on

(a) Air dehydration

(b) Evaporative cooling

(c) Hot air replacement

(d) Air rehydration

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

Which one of the following colours is seen in the middle of a Rainbow?

a) Red

b) Green

c) Blue

d) Yellow

Answer: (b)

Question : 2

Velocity of light is maximum in

a) Vacuum

b) Water

c) Diamond

d) Hydrogen

Answer: (a)

Question : 3

Low temperatures (cryogenics) find application in :

a) surgery, magnetic levitation and telemetry

b) space travel, surgery and magnetic levitation

c) space travel, surgery and telemetry

d) space travel, magnetic levitation and telemetry

Answer: (b)

Question : 4

When a bottle is filled with water and it is freezing the bottle breaks down, because

a) Bottle shrinks at freezing point

b) The temperature outside the bottle is higher than inside

c) Water expands upon freezing

d) Water expands on heating

Answer: (c)

Question : 5

A hydrogen inflated polythene balloon is released from the surface of the Earth. As the balloon rises to an altitude up in the atmosphere, it will

a) Flatten into disc like shape

b) Increase in size

c) Decrease in size

d) Maintain the same size and shape

Answer: (b)

Question : 6

To hear a clear echo, the minimum distance between the reflecting surface and the observer should be

a) 165 metre

b) 16.5 feet

c) 165 feet

d) 16.5 metre

Answer: (d)

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