Set of general knowledge questions on science.

Candidates who are preparing for different examination these science questions are very useful to know how well the preparation is going on. So here is set of 10 science  questions.answers to these question has been highlighted.

Que.1 Light waves are different from sound waves in following ways.

  1. Light waves are electromagnetic but sound waves are not
  2. Light waves can travel through water but sound waves cannot
  3. Light travels with the same speed in all media
  4. Light waves produce interference but sound waves do not
  5. Light can travel through vacuum but sound cannot

Which of the above statements is/are correct?

(a)    1 and 5           (b)  2 and 3

(c)    3 and 4           (d) 1 and 4

Que.2 Infrared rays are used in

  1. Night vision
  2. Breath analyzers for detecting drunken driving
  3. Computed tomography.
  4. Detecting people having fever in a crowd

Which of the above statements is/are correct?

(a)    1, 2 and 3       (b)  1, 3 and 4

 c)    1, 2 and 4       (d) 2, 3 and 4

Que.3 Air is completely removed from an electric bulb to prevent

(a)    Oxidation of tungsten filament

(b)    Bursting of the bulb

(c)    Loss of light due to absorption

(d)    None of these

Que.4 Optical fibers are used

  1. For long distance communications.
  2. In sensors for measuring the inside temperature of jet engines
  3. For spreading sunlight from the roof to other parts of the building
  4. In endoscopy

Which of the above is/are correct?

(a)    1, 2 and 3       (b)  1, 3 and 4

(c)    1, 2, 3 and 4   (d) 2, 3 and 4

Que.5 What happens when a rose is illuminated with green light?

(a)    The leaves become warmer than the petals.

(b)    The petal becomes warmer than the leaves.

(c)    Both petals and leaves remain unaffected.

(d)    Both petals and leave s become equally warm.

Que.6 Consider the statements given below.

  1. A jet aircraft moving at Mach number equal to 1 travels faster at an altitude of 15 km than while moving at Mach number equal to 1 near the sea level.
  2. The velocity of sound depends on the temperature of the surrounding medium.

Which of the above statements is/are correct? 

(a)    Only 2            (b)  Only 1

(c)    Both 1 and 2  (d) Neither 1 nor

Que.7 A body would weight more at the poles than at the equator because

  1. Equatorial radius is greater than polar radius
  2. The earth rotates about its axis
  3. The poles are covered with thick snow
  4. Polar radius is greater than equatorial radius

(a)    1 and 2 are correct

(b)    2 and 4 are correct

(c)    Only 1 is correct

(d)    1, 2 and 3 are correct

Que.8 Consider the following statements :

  1. Radio signals (or radio programmes) can be received anywhere on the earth.
  2. Radio waves are able to penetrate the ionosphere.

Which of the above statements is/are true?

(a)    Neither 1 nor 2     (b)         Both 1 and 2

(c)    1 only                      (d) 2 only

Que.9 A timber, filled to the brim with water, has an ice cube floating in it. A part of the floating ice cube is above the surface of the water. What happens when the cube starts melting?

(a)    Water starts spilling over.

(b)    Water level remains the same.

(c)    Water level starts falling.

(d)    Water level first falls and then rises.

Que.10 Rectangular strips of two metals A and B are riveted to make a bimetal strip. A has higher expansivity than B. When the bimetal strip is heated it

(a)    Remains unaffected

(b)    Bends with A on the convex side

(c)    Bends with B one the convex side

(d)    Gets unriveted


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