This quiz works best with JavaScript enabled. Home > Class 6 > Class 6 Science Chapter 15 Air Around Us – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 6 Science Chapter 15 Air Around Us Quiz 15 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. ..... GAS IS A COMPONENT OF NITRIC ACID, AMOMIA, COOLING AGENT ETC. A) O2. B) C02. C) NO2. D) NONE OF THESE. Show Answer Correct Answer: C) NO2. 2. ..... from cars makes the air dirty. A) Smell. B) Smoke. C) Smog. D) None of the above. Show Answer Correct Answer: B) Smoke. 3. Which air supports burning A) Nitrogen. B) Oxygen. C) Argon. D) Carbon di-Oxide. Show Answer Correct Answer: B) Oxygen. 4. What is air? A) A mixture of different gases. B) Air is found everywhere. We cannot see air, but we can feel it. C) Air occupies space. D) Air is resent everywhere. E) All of the above. Show Answer Correct Answer: E) All of the above. 5. Cockroaches, housefly etc. breath through A) Spiracles. B) Lungs. C) All the above. D) None of the above. Show Answer Correct Answer: A) Spiracles. 6. Which organ is used by birds and mammals to breathe in air? A) Gills. B) Skin. C) Lungs. D) None of the above. Show Answer Correct Answer: C) Lungs. 7. Apart from Nitrogen, which is the other major gas present in the air. A) Nitrogen. B) Hydrogen. C) Water Vapour. D) Oxygen. Show Answer Correct Answer: D) Oxygen. 8. Breathing air through mouth is not hygienic because? A) Our throat will become sore. B) Dust particles will enter our lungs. C) We will inhale more carbondioxide. D) We will easily catch cold. Show Answer Correct Answer: B) Dust particles will enter our lungs. 9. Air gets ..... when the amount of carbon dioxide, smoke and other harmful (dangerous) gases in the air increases. A) Polluted. B) Safer. C) Healthier. D) None of the above. Show Answer Correct Answer: A) Polluted. 10. What are the users of Oxygen?(a) Living being(b) Combustion of fuel(c) Rusting of iron(d) All the above A) A. B) B. C) C. D) D. Show Answer Correct Answer: D) D. 11. Which gas do plants leave out? A) Carbon dioxide. B) Nitrogen. C) Oxygen. D) Hydrogen. Show Answer Correct Answer: C) Oxygen. 12. Plants do not respire A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 13. Out of 100 oxygen is ..... % A) 33. B) 53. C) 21. D) 89. E) Both a&b. Show Answer Correct Answer: C) 21. 14. Which type of air is more dense? A) Warm air. B) Cold air. C) Tropical air. D) None of the above. Show Answer Correct Answer: B) Cold air. 15. Which gas present in the air supports burning A) Nitrogen. B) Water vapor. C) Carbon dioxide. D) Oxygen. Show Answer Correct Answer: D) Oxygen. 16. ..... makes us possible to fly kites A) Moving air. B) Gravity. C) Pressure. D) None of the above. Show Answer Correct Answer: A) Moving air. 17. Arrange the jumbled words DILLMWIN A) Wind air. B) Water mill. C) Wind mill. D) None of these. Show Answer Correct Answer: C) Wind mill. 18. The ratio of nitrogen to oxygen in the air is approximately ..... ?? A) 1:4. B) 4:1. C) 6:1. D) 3:1. Show Answer Correct Answer: B) 4:1. 19. The force pushing on an area is called density. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 20. As we move higher up, the air gets ..... A) Rarer. B) Denser. C) Heavier. D) Lighter. Show Answer Correct Answer: A) Rarer. 21. What does ozone in the atmosphere do? A) It absorbs and traps heat energy. B) It provides a place for water vapor to condense. C) It protects against harmful uv radiation. D) It helps plants grow. Show Answer Correct Answer: C) It protects against harmful uv radiation. 22. Organism living in soil breathe through ..... A) Carbon dioxide in soil. B) Dissolved oxygen in soil. C) Air present in soil. D) There is no air in soil. Show Answer Correct Answer: C) Air present in soil. 23. Which gas is removed from the atmosphere by green plants to be used in photosynthesis? A) Oxygen. B) Argon. C) Carbon dioxide. D) Nitrogen. Show Answer Correct Answer: C) Carbon dioxide. 24. Gas in the atmosphere that protects the Earth from the Sun's rays A) Atmosphere. B) Troposphere. C) Ozone. D) Nitrogen. Show Answer Correct Answer: C) Ozone. 25. Does nitrogen supports burning of a candle? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. ← PreviousNext →Related QuizzesClass 6 Science Chapter 15 Air Around Us Quiz 1Class 6 Science Chapter 15 Air Around Us Quiz 2Class 6 Science Chapter 15 Air Around Us Quiz 3Class 6 Science Chapter 15 Air Around Us Quiz 4Class 6 Science Chapter 15 Air Around Us Quiz 5Class 6 Science Chapter 15 Air Around Us Quiz 6Class 6 Science Chapter 15 Air Around Us Quiz 7Class 6 Science Chapter 15 Air Around Us Quiz 8Class 6 Science Chapter 15 Air Around Us Quiz 9Class 6 Science Chapter 15 Air Around Us Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books