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 2020-2021

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 2020-21

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

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

[A]. The human eye works on the refraction of light
[B]. The eye lens is a convex lens made of a transparent, soft and flexible material like a jelly made of proteins.
[C]. The focal length of a lens can be changed by changing its shape by the action of ciliary muscles.
[D]. All the above
Q2

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




Q3

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]. Rods are the rod-shaped cells present in the retina of an eye which are sensitive to dim light.
[B]. Cone are the cone shaped cells present in the retina of an eye which are sensitive to bright light or normal light.
[C]. The cones easily work on in dim light but not bright light.
[D]. Normal eye can see the distant objects as well as the nearby objects clearly due to its power of accommodation.
Q4

Badal appeared in class test but he confused to know the incorrect statement. Would you help him to know that?

[A]. Myopia is that defect of vision due to which a person cannot see the distant object clearly.
[B]. The far point of an eye suffering from myopia is less than infinity.
[C]. Myopia is corrected by using spectacles containing concave lenses.
[D]. The whole purpose of using a concave lens here is to increasing the converging power of the eye-lens.




Q5

The bluish colour of water in deep sea is due to

[A]. The presence of algae and other plants found in water
[B]. Reflection of sky in water
[C]. Scattering of light
[D]. Absorption of light by the sea
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

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.
Q8

The focal length of the eye lens increases when eye muscles

[A]. Are relaxed and lens become thinner [B] [C] [D]
[B]. Contract and lens becomes thicker
[C]. Are relaxed and lens becomes thicker
[D]. Contract and lens becomes thinner



Q9

How does the eye change in order to focus on near or distant objects?

[A]. The lens moves in or out
[B]. The retina moves in or out
[C]. The lens becomes thicker or thinner
[D]. The pupil gets larger or smaller
Q10

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.
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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