Practice CBSE Class 6 Science Air Around Us MCQs provided below. The MCQ Questions for Class 6 Chapter 15 Air Around Us Science with answers and follow the latest CBSE/ NCERT and KVS patterns. Refer to more Chapter-wise MCQs for CBSE Class 6 Science and also download more latest study material for all subjects
MCQ for Class 6 Science Chapter 15 Air Around Us
Class 6 Science students should review the 50 questions and answers to strengthen understanding of core concepts in Chapter 15 Air Around Us
Chapter 15 Air Around Us MCQ Questions Class 6 Science with Answers
Question: Air is a/an
a) mixture
b) element
c) compound
d) None of these
Answer: mixture
Question: Which of the following component of air cannot be taken directly by plants?
a) Nitrogen
b) None of these
c) Oxygen
d) Carbon dioxide
Answer: Nitrogen
Question: Wind mill is used
a) All of these
b) to draw water from tubewells
c) to generate electricity
d) to run flour mills
Answer: All of these
Question: In which of the following cities would there be maximum water vapour in the air on a sunny day in December?
a) Mumbai
b) Delhi
c) Srinagar
d) Bhopal
Answer: Mumbai
Question: If burning splinter is taken close to the gas jar filled with oxygen, taken gas formed is
a) carbon dioxide
b) sulphur dioxide
c) nitrogen dioxide
d) carbon monoxide
Answer: carbon dioxide
Question: Photosynthesis by plant releases
a) O2
b) CO2
c) CO
Answer: O2
Question: Oxygen is consumed from atmosphere in the following process
a) combustion of fuel
b) absorbed by green plants during photosynthesis
c) biological fixation by symbiotic bacteria
d) cultivation of land
Answer: combustion of fuel
Question: The percentage composition of oxygen in air is
a) 1/5 of the volume
b) 1/6 of the above volume
c) 1/4th of the volume
d) None of these
Answer: 1/5 of the volume
Question: Nitrogen is used
a) in preserving tinned foods
b) all are correct
c) as a refrigerant
d) in electric bulbs
Answer: in preserving tinned foods
Question: Which gas makes up major part of the air?
a) Nitrogen
b) Helium
c) Krypton
d) Argon
Answer: Nitrogen
Question: The constituent of air that supports combustion is
a) oxygen
b) nitrogen
c) carbon dioxide
d) No0ne of these
Answer: oxygen
Question: Which of the following represents correct order of abundance of various gases in air?
a) Nitrogen> Oxygen> Carbon dioxide> Argon
b) Nitrogen> Oxygen> Argon> Carbon dioxide
c) Oxygen > Nitrogen> Carbon dioxide> Argon
d) Carbon dioxide> Nitrogen> Oxygen > Argon
Answer: Nitrogen> Oxygen> Carbon dioxide> Argon
Question: Which of the following is a variable component of air ?
a) Water vapour
b) Nitrogen
c) Oxygen
d) Carbon dioxide
Answer: Water vapour
Question: The atmospheric layer nearest the earth's surface is the
a) troposphere
b) stratosphere
c) ionosphere
d) mesosphere
Answer: troposphere
Question: Which of the following is second layer of atmosphere?
a) Stratosphere
b) Thermosphere
c) Troposphere
d) Mesosphere
Answer: Stratosphere
1. Which of the following is second layer of atmosphere?
(A) Troposphere (B) Stratosphere
(C) Mesosphere (D) Thermosphere
2. Which of the following is a variable component of air ?
(A) Nitrogen (B) Oxygen
(C) Water vapour (D) Carbon dioxide
3. The atmospheric layer nearest the earth's surface is the
(A) stratosphere (B) ionosphere
(C) troposphere (D) mesosphere
4. Which of the following represents correct order of abundance of various gases in air?
(A) Nitrogen> Oxygen> Carbon dioxide> Argon
(B) Nitrogen> Oxygen> Argon> Carbon dioxide
(C) Oxygen > Nitrogen> Carbon dioxide> Argon
(D) Carbon dioxide> Nitrogen> Oxygen > Argon
5. The constituent of air that supports combustion is
(A) oxygen (B) nitrogen
(C) carbon dioxide (D) (A) and (B) both
6. Which gas makes up major part of the air?
(A) Nitrogen (B) Argon
(C) Helium (D) Krypton
7. Nitrogen is used
(A) in electric bulbs.
(B) as a refrigerant.
(C) in preserving tinned foods.
(D) all are correct.
8. The percentage composition of oxygen in air is
(A) 1/4 th of the volume
(B) 1/6 of the above volume
(C) 1/5 of the volume
(D) 1/3 rd of the volume
9. Oxygen is consumed from atmosphere in the following process
(A) combustion of fuel.
(B) absorbed by green plants during photosynthesis.
(C) biological fixation by symbiotic bacteria.
(D) cultivation of land.
1.
Take an empty glass bottle. Turn it, upside down. Now, dip the open mouth of the bottle into the bucket filled with water. Now tilt the bottle slightly. You can see bubbles coming out of the bottle or hear any bubbly sound. Which of the following cannot be inferred from this activity?
a. Air is everywhere. It is present even in the empty bottle.
b. Air does not have any colour and it is transparent
c. Air has weight
d. Air occupies space
Answer: C
2. Fix two small candles of the same size in the middle of two shallow containers. Now, fill the containers with some water. Light the candles and then cover each one of them with an inverted glass (one much taller than the other) Observe carefully what happens to the burning candles and the water level. What do you not infer from this experiment:
a. There is a component of air that is required for burning
b. As that component has been consumed during burning the candles went off.
c. The height of the water in the inverted glasses is 1/5th the height of the glass. It means that component is 1/5th of the air
d. The remaining air is nitrogen
Answer: D
3. Mountaineers carry oxygen cylinder with them because:
a. The air is very cold up the mountain
b. There is less air on the top of the mountain
c. They feel happy carrying the oxygen cylinders
d. Oxygen is required for burning
Answer: B
4. Plants and animals consume oxygen for respiration and produce carbon dioxide. How is this carbon dioxide consumed to balance the carbon dioxide—oxygen balance.
a. People stop breathing for some time
b. Plants can be burnt to release oxygen
c. Plants take in carbon dioxide and exhale oxygen during photosynthesis
d. Oxygen comes into the earth’s atmosphere from outside.
Answer: C
5. We should breathe through the nose and not by the mouth, because ____
a. it is a bad habit
b. the air is moisturized when we breathe through mouth
c. the hair and mucus in our nostrils trap soot and dust particles present in the air
d. it is natural phenomenon
Answer: C
6. Take some water in a glass vessel or beaker. Heat it slowly on a tripod stand. Well before the water begins to boil, look carefully at the inner surface of the vessel. From where do these bubbles come?
a. These bubbles are due to the heating of water closer to the vessel
b. These bubbles are due to extremely cold temperature of the water
c. The dissolved air comes out of the water
d. The bubbles are due to formation of fog
Answer: C
7. Earth worms come out of the soil during rainy seasons because:
a. The rain goes into the soil and reaches the water table. The earthworms come out to be relieved of the wet weather.
b. The rain fills up the space between soil particles. The air comes out; Hence earthworms come out for breathing
c. The earthworms come out to move around in the sun
d. None of the above
Answer: B
8.
This is a wind mill. It uses air for:
a. Making it move and thus it is able to generate electricity
b. Making it move to show the direction of the wind
c. Making it move to show signals
d. Making it move to slow down vehicles
Answer: A
9. Air plays an important role in water cycle. How?
a. Air moves over the oceans
b. Air moves over the land
c. Air moves to evaporate water which then condenses on cooler layers
d. Air is everywhere.
Answer: C
10. Plants depend on animals and animals depend on plants. How?
a. Plants cannot get water without animals
b. Plants use carbon dioxide for preparing food and animals give out carbon dioxide during respiration. Thus a balance is maintained in the oxygen –carbon dioxide level.
c. Plants and animals cannot live without food and shelter.
d. None of the above.
Answer: B
Answer Key
Important Practice Resources for Class 6 Science
MCQs for Chapter 15 Air Around Us Science Class 6
Students can use these MCQs for Chapter 15 Air Around Us to quickly test their knowledge of the chapter. These multiple-choice questions have been designed as per the latest syllabus for Class 6 Science released by CBSE. Our expert teachers suggest that you should practice daily and solving these objective questions of Chapter 15 Air Around Us to understand the important concepts and better marks in your school tests.
Chapter 15 Air Around Us NCERT Based Objective Questions
Our expert teachers have designed these Science MCQs based on the official NCERT book for Class 6. We have identified all questions from the most important topics that are always asked in exams. After solving these, please compare your choices with our provided answers. For better understanding of Chapter 15 Air Around Us, you should also refer to our NCERT solutions for Class 6 Science created by our team.
Online Practice and Revision for Chapter 15 Air Around Us Science
To prepare for your exams you should also take the Class 6 Science MCQ Test for this chapter on our website. This will help you improve your speed and accuracy and its also free for you. Regular revision of these Science topics will make you an expert in all important chapters of your course.
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