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Saturday, August 28, 2021

MCQ Questions for Class 10 Science Chapter 11

If you are looking for MCQ Questions for Class 10 Science Chapter 11, then you are in the right place. These MCQ questions are based on NCERT Solutions for class 10 science Chapter 11. So you should go through chapter 11 - The Human  Eye and The Colourful World.



MCQ Questions for Class 10 Science Chapter 11 have been prepared on the basis of the CBSE syllabus for Class 10 Science for Academic session 2021-22.

 

MCQ Questions for Class 10 Science Chapter 11

 MCQ Questions for Class 10 Science Chapter 11 have been prepared according to the new pattern of 10 Board Examinations 2021-22 and completely based on the NCERT Science book of class 10.


Correct answers with Explanation are also given so that you can better understand the basic concept of questions.Ch 11 science class 10 NCERT solutions will help you to solve these MCQ questions more effectively.



For detailed and thorough study you can also, check NCERT Solution of Class 10 Science.



The students can download MCQ Questions for Class 10 Science Chapter 11 in PDF format from the link given below.



MCQ Questions for Class 10 Science Chapter 11 lets you understand the structure of the human eye, accommodation power, eye defects and their corrections. In this chapter, you will also learn about atmospheric refraction and another phenomenon like- blue colour of the sky, formation of the rainbow, reddish colour of the sky at the time of sunrise and sunset, the twinkling of stars, Tyndall effect.



To better understand the topics you must go through NCERT solutions of class 10 chapter 11.

 

 

 Chapter 11 The Human Eye and the Colourful World

 Multiple Choice Questions  

 Choose the correct answer

1.    Light enters the eyes through

(a)  pupil                                         

(b) Iris

(c) Cornea                                                

(d) Retina

Correct answer- (c)

Explanation – Cornea is the transparent part of eye so light enters through it.


2.    In human eye, image is formed at

(a)pupil                                           

(b)iris

(c)cornea                                         

(d)retina

Correct answer- (d)

Explanation –After refection by the eye lens. Light rays get focused on retina. So image is formed at retina.

 

3.    Amount of entering light is adjusted by

(a) pupil                                          

(b)iris

(c)cornea                                         

(d)retina

Correct answer- (a)

Explanation – Pupil is a small hole in Iris of eye, light enters through pupil. It expands and contracts according to the intensity of light.

 

4.    The size of pupil is controlled by

(a) iris                                    

(b)ciliary muscles

(c) cornea                                        

(d)all the above

Correct answer- (a)

Explanation – Pupil is small hole in iris and its expansion and contraction is controlled by iris.

 

5.    Focal length of the eye lens is changed by

(a) iris                                             

(b)ciliary muscles

(c) cornea                                        

(d)all the above

Correct answer- (b)

Explanation – Eye lens is attached with ciliary muscles. These ciliary muscles contract and expand, due to which focal length of the lens is changed.

 

6.    The diameter of eye ball is

(a)1.3 cm                                                 

(b)2.5 cm

(c) 3.3 cm                                      

(d)2.3 cm

Correct answer- (d)

 

 

7.    When ciliary muscles are relaxed the focal length of eye lens is

(a) 1.3 cm                                                 

(b)2.5 cm

(c)  3.3 cm                                      

(d)2.3 cm

Correct answer- (b)

Explanation – 25 cm is the near point of a healthy eye at which objects can be seen clearly without any stress.

 

8.    A person can see an object when its image is formed

(a) in front of the retina                           

(b)away from the retina

(c)  in front of cornea                     

(d) at the retina

Correct answer- (d)

 

 

9.    The least distance of distinct vision is

(a)  25cm                                        

(b)35 cm

(c)  30 cm                                       

(d)infinity

Correct answer- (a)

Explanation – 25 cm is the least distance of distinct vision and it is also known as near point of eye.

 

10. The far point of the normal vision is

(a)25cm                                         

(b)35 cm

(c)30 cm                                       

(d)infinity

Correct answer- (d)

Explanation – A healthy eye can see far objects like stars that are at infinity distance.

 

11. A convex lens is used to rectify

(a) myopia                                      

(b)presbyopia

(c) hypermetropia                            

(d)astigmatism

Correct answer- (c)

Explanation – A person with hypermetropia cannot see nearby objects clearly so a convex lens is used to rectify this eye defect.

 

12.  When focal length of eye lens increases permanently, it results in 

(a) myopia                                      

(b)presbyopia

(c) hypermetropia                          

(d) astigmatism

Correct answer- (c)

Explanation - Focal length of eye lens increases, near point of eye, goes far away so a person can’t see nearby objects and it result in hypermetropia.

 

13.   In the beginning of a cataract a person

(a) cannot see in dim-light            

(b)sees all the objects of white colour

(c) cannot distinguish in certain colours        

(d)can see using a lens of power

Correct answer- (a)

 

 

14. Ageing results in

(a) myopia                                      

(b)presbyopia

(c) hypermetropia                                  

(d)astigmatism

Correct answer- (b)

Explanation – Power of accommodation of eye, lens decreases with ageing and cause presbyopia.

 

15.A person cannot simultaneously focus on both horizontal and vertical lines, he is suffering from

(a) myopia                                      

(b)presbyopia

(c) hypermetropia                          

(d)astigmatism

Correct answer- (d)

 

 

16. Elongation of eyeball results

(a) myopia                                      

(b)presbyopia

(c)  hypermetropia                                 

(d)all the above

Correct answer- (a)

 

 

17. The lens used to rectify myopia is

(a) convex                                      

(b)concave

(c) cylindrical                                 

(d)bifocal

Correct answer- (b)

Explanation -

 

18. The lens used to rectify astigmatism is

(a) convex                                      

(b)concave

(c) cylindrical                                 

(d)bifocal

Correct answer- (c)

Explanation – Concave lens is used to see far objects clearly.

 

19.The lens used to rectify hypermetropia is

(a) convex                                      

(b)concave

(c) cylindrical                                 

(d)bifocal

Correct answer- (a)



20. An old person cannot see nearby and distant objects, he should use

(a) convex                                      

(b)concave

(c) cylindrical                                 

(d)bifocal

Correct answer- (d)

Explanation – In bifocal length both concave and convex lenses are used.

 

21. Cataract can be corrected by using

(a) convex lens                               

(b)concave lens

(c) bifocal lens                              

(d)it cannot be corrected by the use of a lens

Correct answer- (d)

 

 

22. The person cannot donate eyes, who is suffering from

(a) asthma                                       

(b)hypertension

(c) diabetes                                               

(d)leukaemia

Correct answer- (d)

 

23. Rainbow is caused due to .............. of light.

(a) reflection                                  

(b)refraction

(c) dispersion                                  

(d)all the above

Correct answer- (d)

Explanation – At the time of rain, sunlight passes through water droplets and get refracted, reflected and dispersed, due to this rainbow is formed in the sky.

 

24. Very fine particles scatter mainly

(a) red light                                              

(b)blue light

(c) green light                                 

(d)all the light

Correct answer- (b)

 

25. The time difference between actual sunset and the apparent sunset is about

(a)4 minutes                                 

(b)6 minutes

(c) 2 minutes                                           

(d)15 minutes

Correct answer- (c)

 

 

26.A student sitting on the last bench can read the letters, written on the blackboard but cannot read the book. The correct statement about him is

(a)  the far point of his eyes has come closer to him

(b) the far point of his eyes has receded away

(c)  the near point of his eyes has come closer to him

(d) the near point of his eyes has receded away

Correct answer- (d)

Explanation – when a person can’t see nearby objects clearly. It means the near point of his eye has gone far away.

 

27. Regarding the propagation of light, the correct statement is

(a) red light mover fastest                      

(b)blue light moves fastest

(c) lights of all colours move at the same speed

(d) red light moves faster than orange light

Correct answer- (c)

 

 

28.   The clear sky appears blue, because

(a) in the noon, infra-red rays are absorbed                               

(b)blue and violet colour lights are scattered more than all other colours by the atmosphere 

(c) blue light gets absorbed in the atmosphere

(d) light of other colours, except violet and blue are scattered more

Correct answer- (b)

Explanation – blue and violet colours of the sunlight are scattered by small particles of the upper layer of the atmosphere.

 

29.   At noon the sun appears white, because

(a)  all the colours of white light are scattered away

(b)  blue and red colour lights are absorbed

(c)  in the noon, infrared rays are absorbed

(d)  blue and red colour lights are scattered move

Correct answer- (a)

 

 

30. Twinkling of stars takes place due to atmospheric

(a)  internal reflection of light by clouds

(b)  refraction of their light by layers of different refractive indices

(c)  scattering of light by dust particles

(d)  dispersion of light by water droplets

Correct answer- (b)

 

 

31. Signals or danger signals are mostly red because red light is scattered

(a) the least by smoke or fog                 

(b)the  most by smoke or fog

(c) not at all                                      

          (d)attractively

Correct answer- (a)

Explanation – Red light is of a long wavelength.

 

32. Clouds generally appear white due to

(a) absorption of all colours of light     

(b)scattering of all colours of light

(c) reflection of light                     

(d)refraction of light

Correct answer- (b)

 

 

33. Deepwater appears blue due to

(a) algae and other aquatic plants present

(b)image of blue sky

(c) scattering of light                    

         (d)absorption of light by deep water

Correct answer- (c)

 

 

34. Light entering the eye gets the most refraction at the

(a)  iris                                            

(b) outer surface of the cornea

(c) crystalline lens                                   

(d)pupil

Correct answer- (b)


35. At sunrise or sunset, the sun and the surrounding sky appears red due to

(a)  total internal reflection of light       

(b) refraction of light through the atmosphere

(c)  at sun rise or sun set, the red light of longer wavelength can reach our eyes

(d) dispersion of light

Correct answer- (c)

 

   36.  A person cannot see a distinct objects kept beyond 2 m. the defect can be corrected by using a lens of power-

(a)+0.5D

(b)-0.5D

(c)+0.2D

(d)-0.2D

 Correct answer- (b)

 

    37.  The focal length of eye lens increases when eye muscles–

  (a)contract and lens becomes thicker

  (b) are relaxed and lens becomes thinner

  (c) are relaxed and lens becomes thicker

  (d) contract and lens becomes thinner

  Correct answer- (b)

 

 

       38.   Which of the following is correct?

        (a)A person with hypermetropia cannot see distant objects clearly

        (b)  A person with myopia can see nearby objects clearly

        (c)A person with hypermetropia can see nearby objects clearly

        (d)A person with myopia can see distant objects clearly

Correct answer- (b)

Explanation – A person with myopia can see nearby objects clearly but can’t see distant objects clearly, as his far point becomes nearer than infinity. It is also called near-sightedness.


     39.   In an experiment to trace the path of a ray of light through a glass prism for different values of angle of incidence a student would find that the emergent ray-

       (a)Is parallel to the incident ray

       (b)  perpendicular to the incident ray

       (c)is parallel to the refracted ray

       (d)bands at an angle to the direction of the incident ray

     Correct answer –(d)


     40. The property related to the sense of continuity of vision is called

(a)Colour blindness

(b)Optical illusion

(c) Persistence of vision

(d) None of these

Correct answer –(c)


     41.  The focal length of the eye lens increases when eye muscles

(a) contract  and lens becomes thicker

(b) are relaxed and lens becomes thinner

(c) are relaxed and lens becomes thicker

(d) contract and lens becomes thinner

Correct answer –(b)


     42.   The message of image, formation is conveyed to the brain by

      (a)Cornea

      (b)  Yellow spot

      (c)Optical nerves

     (d)    Ciliary muscles

     Correct answer – (c)

 

      43. Colour blindness is due to the absence of

      (a)Rod shapped cells

      (b)  Cone –shaped cells

      (c)Both (a) and (b)

      (d)None of these

     Correct answer- (b)



Class 10 science chapter 11 fill in the blanks

Following fill in the blanks will be very useful and important for you in the context of new pattern of CBSE Class Board Exams 2021-22. You can prepare Multiple Choice Questions using following fill in the blanks yourself.


The Human Eye and the Colourful World fill in the blanks

 

Fill in the blanks

1. Eye donor can belong to any age group or ........


2.Light enters the eye through ........


3.Far point of a normal human eye is ........


4.In human-eye, image is formed at ........


5.The ........ shaped cells present in retina respond to the intensity of light. 

 

6.When the light is very bright, the pupil becomes ........


7.At an age of 60 years, the near point is about ........ cm.


8.  A short-sighted person, cannot see the ........ objects clearly.


9.A convex lens is used to rectify ........ sightedness.


10.The least distance of distinct vision is ........ cm.


11.The retina of chick has mostly ........


12.A ........ person cannot see distant objects.


13.A cylindrical lens is used to correct ........


14.Iris controls the size of ........


15......... helps in regulating the amount of the light entering the eye.


16.When the muscles are relaxed, the focal  length of eye-lens is about ........ cm


17.The ability of eye-lens to adjusts its focal length is called ........


18.The splitting of white light into its component colours is called ........


19......... of light causes sky blue.


20.The red light bends ........


21.The twinkling of stars is based on ........ refraction.


22.The ........ of scattered light depends on the size of scattering particles.


23.Low converging power of eye lens results in ........


24......... develops due to aging.


25.In ........, a person cannot focus on horizontal and vertical lines simultaneously.


26.A thin membrane develops over the eye lens in ........


27.A concave lens is used to rectify ........


28.Excessive curvature of cornea, results in ........


29.When eyeball becomes shorter than normal one, person suffers from ........


30.When the ciliary muscles are relaxed, the focal length of eye-lens is about ........ cm.


Must remember the following points-

  ü Outer bulging part of the eye is called cornea which allow light to enter in eye.


  ü Iris controls the amount of light entering the eye by adjusting the size of pupil.


  ü Retina acts as a screen on which image is formed.


  ü Optic nerve carries a message of the image from retina to the brain.


  ü Violet colour deviates most and red colour deviates least.


  ü Scattering of light is bouncing back of light in a different direction when if fall on tiny particles.


 I hope this article will be very helpful to you. I am working regularly to provide you with the best educational content.


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 you can download MCQ Questions for Class 10 Science Chemistry Chapter 11

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