Class 10 Science Chapter 11 MCQ (Multiple Choice Questions) of Human Eye and Colourful World. Practice with these important questions to be confident in topics given in chapter 11 of grade 10 science. All the questions are useful for the preparation of class test or terminal exams. Questions are taken from NCERT Book intext pages and exercises question answers.

Class 10 Science Chapter 11 MCQ with Answers for 2022-2023

Class: 10Science
Chapter: 11Human Eye and Colourful World
Contents:MCQ Online Tests with Explanation and Answers

Class 10 Science Chapter 11 MCQ Online Test for 2022-23

Class 10 Science Chapter 11 MCQ Online tests with solutions and explanation are given below. All the questions are important for exams. After completing Chapter 11 from NCERT Textbook, these questions are helpful for the preparation of exams in less time.

Q1

Sunset is red because at that time the light coming from the sun has to travel:

[A]. Lesser thickness of earth’s atmosphere
[B]. Greater thickness of earth’s atmosphere
[C]. Varying thickness of earth’s atmosphere
[D]. Along the horizon
Q2

At noon the sun appears white as

[A]. Light is least scattered
[B]. All the colours of the white light are scattered away
[C]. Blue colour is scattered the most
[D]. Red colour is scattered the most
Q3

The sky appears blue because some of the blue component of sunlight is scattered by:

[A]. Gas molecules present in air
[B]. Dust particles present in air
[C]. Water droplets suspended in air
[D]. Soot particles present in air
Q4

Which of the following statement is or are incorrect?

[A]. The Iris control the amount of light entering the eyes.
[B]. If the amount of light received by the eye is large then the Iris contracts, the Pupil reduces the amount of light entering the eye.
[C]. If the amount of light received by the eye is small, the Iris expands, the pupil so that more light may enter the eyes.
[D]. All the above
Q5

Which of the following phenomena of light are involved in the formation of a rainbow?

[A]. Reflection, refraction and dispersion.
[B]. Refraction, dispersion and total internal reflection.
[C]. Refraction, dispersion and internal reflection
[D]. Dispersion, scattering and total internal reflection
Q6

Which of the following is not caused by the atmospheric refraction of light?

[A]. Twinkling of stars at night
[B]. Sun appearing higher in the sky than it actually is
[C]. Sun becoming visible two minutes before actual sunrise
[D]. Sun appearing red at sunset
Q7

Twinkling of stars is due to atmospheric

[A]. Dispersion of light by water droplets
[B]. Refraction of light by different layers of varying refractive indices
[C]. Scattering of light by dust particles
[D]. Internal reflection of light by clouds
Q8

In a science quiz competition, Rajani are asked a question where she had to choose the statement which was/were incorrect?

[A]. The ability of an eye to focus the distant objects as well as the nearby objects on the retina by changing the focal length of its length is called accommodation.
[B]. The farthest point from the eye at which an object can be seen clearly is known as the “far point” of the eye.
[C]. The least distance of distinct vision for a normal human eye is about 25cm.
[D]. All the above
Q9

The clear sky appears blue because:

[A]. Blue light gets absorbed in the atmosphere
[B]. Ultraviolet radiations are absorbed in the atmosphere
[C]. Violet and blue lights get scattered more than lights of all other colours by the atmosphere
[D]. Light of all other colours is scattered more than the violet and blue colour lights by the atmosphere.
Q10

As light from a far-off star comes down towards the earth:

[A]. It bends away from the normal
[B]. It bends towards the normal
[C]. It does not bend at all
[D]. It is reflected back
Q11

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

[A]. Presbyopia is that defect of vision due to which an old person cannot see the nearby objects clearly due to loss of power of accommodation of the eye.
[B]. The near point of the old person having presbyopia gradually recedes and becomes much more than 25 cm away.
[C]. Presbyopia defect is corrected in the same way as hypermetropia by using spectacles having convex lenses.
[D]. All the above.
Q12

The stars twinkle but the planets do not twinkle at night because:

[A]. The stars are small but the planets are large
[B]. The stars are very large but planets are small
[C]. The stars are much nearer but planets are far off
[D]. The stars are far off but planets are nearer to earth
Q13

Hanshika is writing some important points about the “donation of eyes”. Choose the incorrect statement:

[A]. People who wear spectacles or have undergone cataract operation scan also donate Eyes.
[B]. The doctors of the eye bank team remove the eyes at the home of the dead person or at the hospital and it takes 10-15 minutes.
[C]. Those donated eyes which are not suitable for transplantation are used for doing research and for teaching purposes in medical colleges.
[D]. None of the above.
Q14

The danger signals installed at the top of tall buildings are red in colour. This can be easily seen from the distance because among all the other colours, the red light:

[A]. Is scattered the most by smoke or fog
[B]. is scattered the least by smoke or fog
[C]. Is absorbed the most by smoke or fog
[D]. Moves fastest in air
Q15

The animals called predators have:

[A]. Both the eyes on the sides
[B]. One eye on the side and one at the front
[C]. One eye on the front and one at the back
[D]. Both the eyes at the front
Q16

Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?

[A]. Dispersion of light
[B]. Scattering of light
[C]. Total internal reflection of light
[D]. Reflection of light from the Earth
Q17

Read the following sentences carefully, and choose the incorrect one:

[A]. When a ray of light passes through a prism, it bends towards the thicker part of the prism. [B] [
[B]. The angle between incident ray and emergent ray is called “angle of deviation”.
[C]. In refraction through a glass prism, the emergent ray is parallel to the incident ray.
[D]. None of the above.
Q18

A man driving a car can read a distant road sign clearly but finds difficulty in reading the odometer on the dashboard of the car. Which of the following statement is correct about this man?

[A]. The near point of his eyes has receded away.
[B]. The near point of his eyes has come closer to him.
[C]. The far point of his eyes has receded away.
[D]. The far point of his eyes has come closer to him.
Q19

Consider the following statements and choose the incorrect one:

[A]. The band of seven colours formed on a white screen, when a beam of white light is passes through a glass prism.
[B]. The dispersion of white light occurs because colours of white light travel at different speeds through the glass prism.
[C]. The splitting up of white light into seven colours on passing through a transparent medium like a glass prism is called dispersion of light.
[D]. All the above.
Q20

Vibhu is doing his homework which is given by his teacher. Would you help him to choose the incorrect sentences?

[A]. The violet colour has the minimum speed in glass prism, so the violet colour is deviated the maximum.
[B]. The red colour has the maximum speed in glass prism, so the red colour is deviated the least.
[C]. The seven colours of the spectrum can be denoted by the word VIBGOYR.
[D]. The seven colours of spectrum differ only in their frequencies.
Q21

In the last year board examination, Rahul were asked a question where he had to choose the statement which was/were incorrect? Will you be able to answer this question?

[A]. The scattering of light by particles in its path is called tyndall effect.
[B]. The blue coloured light present in white sunlight is scattered much more easily than the red light.
[C]. Dust particles and water droplets suspended in the atmosphere are much larger than the wavelength range of visible light.
[D]. The nitrogen and oxygen gas molecules present in the atmosphere are bigger than the wavelength range of visible light.
Q22

To focus the image of a nearby object on the retina of an eye:

[A]. The distance between eye-lens and retina is increased [B] [C] [D]
[B]. The distance between eye-lens and retina is decreased
[C]. The thickness of eye-lens is decreased
[D]. The thickness of eye-lens is increased
Q23

The term ” accommodation” as applied to the eye, refers to its ability to:

[A]. Control the light intensity falling on the retina
[B]. Erect the inverted image formed on the retina
[C]. Vary the focal length of the lens
[D]. Vary the distance between the lens and retina
Q24

A student sitting on the last bench in the class cannot read the writing on the blackboard clearly but he can read the book lying on his desk clearly. Which of the following statement is correct about the student?

[A]. The near point of his eyes has receded away.
[B]. The near point of his eyes has come close to him.
[C]. The far point of his eyes has receded away.
[D]. The far point of his eyes has come closer to him.
Q25

The animals of prey have:

[A]. Two eyes at the front
[B]. Two eyes at the back
[C]. Two eyes on the sides
[D]. One eye at the front and one on the side

Class 10 Science Chapter 11 Important Questions

What is the function of Iris?

Iris is a dark muscular diaphragm that controls the size of the pupil.

What is meant by accommodation of eye?

The ability of the eye lens to adjust its focal length is called accommodation.

Why do stars twinkle?

The twinkling of a star is due to atmospheric refraction of starlight. The starlight, on entering the earth’s atmosphere, undergoes refraction continuously before it reaches the earth.This makes continuously change in star’s position and we see the twinkling of stars.

Why does sky apear blue in colour?

The molecules of air and other fine particles in the atmosphere have size smaller than the wavelength of visible light. These are more effective in scattering light of shorter wavelengths at the blue end than light of longer wavelengths at the red end. When sunlight passes through the atmosphere, the fine particles in air scatter the blue colour (shorter wavelengths) more strongly than red. The scattered blue light enters our eyes and we see blue sky.

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