Class 10 Science Chapter 11 MCQ

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 2021-2022

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 2021-22

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

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
Q2

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




Q3

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
Q4

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.




Q5

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.
Q6

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




Q7

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
Q8

When light rays enter the eye, most of the refraction occurs at the

[A]. Crystalline lens
[B]. Outer surface of the cornea
[C]. Iris
[D]. Pupil



Q9

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
Q10

The human eye possesses the power of accommodation. This is the power to:

[A]. Alter the diameter of the pupil as the intensity of light changes
[B]. Distinguish between lights of different colours
[C]. Focus on objects at different distances
[D]. Decide which of the two objects is closer.
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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