This quiz works best with JavaScript enabled. Home > Cbse > Class 6 > Science > Air Around Us > Class 6 Science Chapter 15 Air Around Us – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 6 Science Chapter 15 Air Around Us Quiz 6 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What kind of gas is neon? A) Trace Gas. B) Noble Gas. C) Combustible Gas. D) None of these. Show Answer Correct Answer: A) Trace Gas. 2. The gas released by green plants during photosynthesis is ..... A) Nitrogen. B) Carbon dioxde. C) Argon. D) Oxygen. Show Answer Correct Answer: B) Carbon dioxde. 3. Windmill rotates because of ..... A) Air. B) Electricity. C) Water. D) Sun Rays. Show Answer Correct Answer: A) Air. 4. The oxygen present in the air is used for A) Respiration. B) Extinguishing fire. C) Burning. D) Both (i) and (iii). Show Answer Correct Answer: D) Both (i) and (iii). 5. What is the lightest gas on Earth's atmosphere? A) Oxygen. B) Helium. C) Hydrogen. D) Carbon Dioxide. Show Answer Correct Answer: C) Hydrogen. 6. A gas produced by animals during respiration that plants use for photosynthesis. A) Carbon dioxide. B) Toots. C) Oxygen. D) Water vapor. Show Answer Correct Answer: A) Carbon dioxide. 7. Major Part of air is covered by which gas? A) Nitrogen. B) Neon. C) Carbon-Dioxide. D) Oxygen. Show Answer Correct Answer: A) Nitrogen. 8. The gas present in the air that turns lime water milky is ..... A) Water vapour. B) Nitrogen. C) Carbon dixode. D) Oxygen. Show Answer Correct Answer: A) Water vapour. 9. What are the percentages of the main gases on Earth? A) 78% oxygen, 21% nitrogen and 1% other. B) 78% other, 21% oxygen and 1% nitrogen. C) 78% nitrogen, 21% oxygen and 1% other. D) 95% carbon dioxide and 5% oxygen. Show Answer Correct Answer: C) 78% nitrogen, 21% oxygen and 1% other. 10. Plants respire only at night? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 11. The layers of the gases that surround the Earth is the ..... A) Mesosphere. B) Lithosphere. C) Hydrosphere. D) Atmosphere. Show Answer Correct Answer: D) Atmosphere. 12. Which of the following processes need oxygen? A) Combustion. B) Respiration. C) Oxidation. D) All of Above. Show Answer Correct Answer: D) All of Above. 13. Where you will find the ozone layer. A) Mesosphere. B) Stratosphere. C) Thermosphere. D) Exosphere. Show Answer Correct Answer: B) Stratosphere. 14. Nitrogen supports burning. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 15. True or FalseA firki rotates only in an open area or in a closed room with the ceiling fan switched on. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 16. Air is present everywhere but not in soil. TRUE or FALSE? A) FALSE. B) TRUE. C) All the above. D) None of the above. Show Answer Correct Answer: A) FALSE. 17. The atmosphere acts as a ..... A) Water. B) Air. C) Blanket. D) Shield. Show Answer Correct Answer: C) Blanket. 18. Choose odd one outBreeze, Dust, Gale, Storm A) Gale. B) Dust. C) Breeze. D) None of the above. Show Answer Correct Answer: B) Dust. 19. Which gas makes up 21% of the atmosphere? A) Nitrogen. B) Ozone. C) Water vapor. D) Oxygen. Show Answer Correct Answer: D) Oxygen. 20. The layers of the atmosphere that get colder as altitude increases are A) Thermosphere and troposphere. B) Meosphere and troposphere. C) Stratosphere and thermosphere. D) Thermosphere and mesosphere. Show Answer Correct Answer: B) Meosphere and troposphere. 21. Formula of carbon dioxide A) H. B) Car. C) H2O. D) CO2. Show Answer Correct Answer: C) H2O. 22. The layer of the atmosphere where meteors burn up A) Troposphere. B) Mesosphere. C) Thermosphere. D) Stratosphere. Show Answer Correct Answer: B) Mesosphere. 23. Other than nitrogen which gas is major in the air? A) Carobn-Dioxide. B) Neon. C) Oxygen. D) Argon. Show Answer Correct Answer: C) Oxygen. 24. What are the uses of Carbon-Dioxide A) Used by plants for photosynthesis. B) Traps the heat from the sun to maintain the Earth's temperature. C) All of the above. D) None of the above. Show Answer Correct Answer: C) All of the above. 25. Windmills do not generate electricity, when wind turns its fan rapidly A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 26. How is the oxygen in the Atmosphere Replaced? Page94 Ramlaxmi.G A) Through volcanic eruptions releasing oxygen. B) Through the process of photosynthesis by plants and phytoplankton. C) By the process of combustion. D) Through the decomposition of organic matter. Show Answer Correct Answer: B) Through the process of photosynthesis by plants and phytoplankton. 27. Which gas is necessary for burning? A) Nitrogen. B) Oxygen. C) CO2. D) None of the above. Show Answer Correct Answer: B) Oxygen. 28. When we cover the burning candle by putting an inverted glass over it. What would happen? A) Candle will keep on burning. B) Candle will blown off. C) All the above. D) None of the above. Show Answer Correct Answer: B) Candle will blown off. 29. Makes three fourth part of total air. A) Oxygen. B) Water Vapour. C) Nitrogen. D) Argon. Show Answer Correct Answer: C) Nitrogen. 30. Which gas is used for human survival in the earth A) Water vapor. B) Dust particles. C) Oxygen. D) Breeze. Show Answer Correct Answer: C) Oxygen. 31. Water is present in the air in the form of ..... A) Water vapor. B) Oxygen. C) Carbon-dioxide. D) Water cycle. Show Answer Correct Answer: A) Water vapor. 32. The gas which is called green house gas is: A) Nitrogen. B) Argon. C) Oxygen. D) Carbon dioxide. Show Answer Correct Answer: D) Carbon dioxide. 33. We cannot ..... air, but we can ..... it. A) Hear, see. B) See, feel. C) Feel, hear. D) Taste, wash. Show Answer Correct Answer: B) See, feel. 34. The layer which protects us from the harmful ultravoilet rays of the sun is? A) Ozone layer. B) Atmosphere. C) Protection layer. D) None of the above. Show Answer Correct Answer: A) Ozone layer. 35. We should breathe through our ..... A) Eyes. B) Nostrils. C) Ears. D) Mouth. Show Answer Correct Answer: B) Nostrils. 36. Take an empty glass bottle. Turn it upside down. Now, dip the open mouth of the bottle into a bucket filled with water. now, tilt the bottle slightly. you can see air bubbles in the water. what can we infer from this? 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 mass. D) None of the above. Show Answer Correct Answer: A) Air is everywhere. It is present even in the empty bottle. 37. Which components of air are harmful to living organisms? A) Nitrogen and oxygen. B) Dust and smoke. C) Oxygen and carbon dioxide. D) Smoke and water vapour. Show Answer Correct Answer: B) Dust and smoke. 38. ..... 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. 39. ..... from cars makes the air dirty. A) Smell. B) Smoke. C) Smog. D) None of the above. Show Answer Correct Answer: B) Smoke. 40. Which air supports burning A) Argon. B) Nitrogen. C) Oxygen. D) Carbon di-Oxide. Show Answer Correct Answer: C) Oxygen. 41. Cockroaches, housefly etc. breath through A) Spiracles. B) Lungs. C) All the above. D) None of the above. Show Answer Correct Answer: A) Spiracles. 42. 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. 43. Apart from Nitrogen, which is the other major gas present in the air. A) Water Vapour. B) Hydrogen. C) Oxygen. D) Nitrogen. Show Answer Correct Answer: C) Oxygen. 44. Breathing air through mouth is not hygienic because? A) Our throat will become sore. B) We will easily catch cold. C) Dust particles will enter our lungs. D) We will inhale more carbondioxide. Show Answer Correct Answer: C) Dust particles will enter our lungs. 45. 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. 46. What are the users of Oxygen?(a) Living being(b) Combustion of fuel(c) Rusting of iron(d) All the above A) C. B) B. C) A. D) D. Show Answer Correct Answer: D) D. 47. Which gas do plants leave out? A) Hydrogen. B) Carbon dioxide. C) Nitrogen. D) Oxygen. Show Answer Correct Answer: D) Oxygen. 48. Plants do not respire A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 49. Out of 100 oxygen is ..... % A) 33. B) 53. C) 21. D) 89. E) Both a&b. Show Answer Correct Answer: C) 21. 50. 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. 51. Which gas present in the air supports burning A) Nitrogen. B) Carbon dioxide. C) Water vapor. D) Oxygen. Show Answer Correct Answer: D) Oxygen. 52. ..... 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. 53. 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. 54. The ratio of nitrogen to oxygen in the air is approximately ..... ?? A) 4:1. B) 1:4. C) 6:1. D) 3:1. Show Answer Correct Answer: A) 4:1. 55. 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. 56. As we move higher up, the air gets ..... A) Lighter. B) Denser. C) Heavier. D) Rarer. Show Answer Correct Answer: D) Rarer. 57. Organism living in soil breathe through ..... A) Dissolved oxygen in soil. B) Air present in soil. C) There is no air in soil. D) Carbon dioxide in soil. Show Answer Correct Answer: B) Air present in soil. 58. Which gas is removed from the atmosphere by green plants to be used in photosynthesis? A) Argon. B) Nitrogen. C) Oxygen. D) Carbon dioxide. Show Answer Correct Answer: D) Carbon dioxide. 59. Gas in the atmosphere that protects the Earth from the Sun's rays A) Troposphere. B) Nitrogen. C) Ozone. D) Atmosphere. Show Answer Correct Answer: C) Ozone. 60. 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 QuizzesScience QuizzesClass 6 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 7Class 6 Science Chapter 15 Air Around Us Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books