This quiz works best with JavaScript enabled. Home > Cbse > Class 6 > Science > Air Around Us > Class 6 Science Chapter 15 Air Around Us – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 6 Science Chapter 15 Air Around Us Quiz 8 (54 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Gas used in balloons to make them float? A) Hydrogen. B) Xenon. C) Helium. D) Ozone. Show Answer Correct Answer: C) Helium. 2. Why do mountaineers take oxygen cylinders with them while climbing a mountain? A) Water is everywhere. B) Climbing mountains is risky. C) They are scared. D) Air is density less. Show Answer Correct Answer: D) Air is density less. 3. Percentage of carbon dioxide in the air? A) 0.000098. B) 0.09. C) 0.1. D) 0.007. Show Answer Correct Answer: B) 0.09. 4. Name some layers of atmosphere A) Mesosphere. B) Thermosphere. C) Exosphere. D) All of these. Show Answer Correct Answer: D) All of these. 5. Which of these is true about Air? A) It has colour. B) It is all around us. C) It can be measured in a cup. D) You can wrap it around you like a blanket. Show Answer Correct Answer: B) It is all around us. 6. Apart from nitrogen which is the another major gas in the composition of air? A) Hydrogen. B) Water vapour. C) Carbon dioxide. D) Oxygen. Show Answer Correct Answer: D) Oxygen. 7. Which of the following gasses helps in burning A) Helium. B) Ozone. C) Oxygen. D) Nitrogen. Show Answer Correct Answer: C) Oxygen. 8. Statement 1:Mountaineers carry oxygen cylinders with them while climbing high mountains.Statement 2:The percentage of oxygen in the air decrease with increasing altitude. A) Statement 1 is true and statement 2 is the correct explanation. B) Both statements are true. C) Statement 1 is true and statement 2 is false. D) Statement 1 is false and statement 2 is true. Show Answer Correct Answer: C) Statement 1 is true and statement 2 is false. 9. Air pressure is measured with a A) Thermometer. B) Hot-air balloon. C) Satellite. D) Barometer. Show Answer Correct Answer: D) Barometer. 10. Which gas is produced by plants during photosynthesis?(a) Nitrogen(b) Carbon Dioxide(c) Hydrogen(d) Oxygen A) A. B) D. C) B. D) C. Show Answer Correct Answer: B) D. 11. Oxygen is produced in the process of in plants. A) Geotropism. B) Respiration. C) Transpiration. D) Photosynthesis. Show Answer Correct Answer: D) Photosynthesis. 12. Which gas plants cannot absorb directly? A) Carbon Dioxide. B) Oxygen. C) Nitrogen. D) Methane. Show Answer Correct Answer: C) Nitrogen. 13. Nitrogen covers ..... % of air A) 38%. B) 78%. C) 75%. D) 76%. Show Answer Correct Answer: B) 78%. 14. What are the uses of oxygen? A) COmbustion. B) Respiration. C) Rusting of iron. D) All of the above. Show Answer Correct Answer: D) All of the above. 15. The animals living in water use the dissolved ..... in water for respiration. A) Hydrogen. B) Oxygen. C) Nitrogen. D) Carbon dioxide. Show Answer Correct Answer: B) Oxygen. 16. What do animals exhale? A) Carbon Dioxide. B) Oxygen. C) Nitrogen. D) None of the above. Show Answer Correct Answer: A) Carbon Dioxide. 17. Aquatic plant and anmials use ..... to respire. A) Dissolved oxygen. B) Dissovled carbon dixode. C) Dissolved nitrogen. D) Dissolved water. Show Answer Correct Answer: A) Dissolved oxygen. 18. State true or false:Air is colourless. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 19. What is the gaseous form of water? A) Water Vapor. B) Xenon. C) Carbon Monoxide. D) Ozone. Show Answer Correct Answer: A) Water Vapor. 20. Statement A:Nitrogen is used in protein synthesisStatement B:Proteins are required by living organisms to grown and repair their body parts(a) Statement A is correct only(b) Statement B is correct only(c) Both the statement is correct(d) Both the statement are incorrect A) A. B) C. C) B. D) D. Show Answer Correct Answer: B) C. 21. Organism in which respiration is not easily seen A) Animals. B) Plants. C) Fish. D) None of the above. Show Answer Correct Answer: B) Plants. 22. How Much Percentage of Nitrogen is in Earth? A) 71.4%. B) 74.3%. C) 78%. D) 80%. Show Answer Correct Answer: C) 78%. 23. NIMBU PAANI/LEMONADE IS A MIXTURE OF A) LEMON JUICE AND WATER. B) LEMON JUICE AND SUGAR. C) LEMON JUICE, SUGAR AND WATER. D) None of the above. Show Answer Correct Answer: C) LEMON JUICE, SUGAR AND WATER. 24. ..... could increase the amount of oxygen in the air. A) Planting more trees. B) Paving more streets. C) Building more houses. D) Burning more oil. Show Answer Correct Answer: A) Planting more trees. 25. What is the gas that plants take in for making food? A) Carbon Dioxide. B) Ozone. C) Oxygen. D) Carbon Monoxide. Show Answer Correct Answer: A) Carbon Dioxide. 26. Bubble is made of what? A) Both 3 & 4. B) Nothing. C) Air. D) Water. Show Answer Correct Answer: A) Both 3 & 4. 27. The thick layer Earth is surrounded by is? A) Thermosphere. B) Hydosphere. C) Atmosphere. D) Lithosphere. Show Answer Correct Answer: C) Atmosphere. 28. The gas present in the maximum amount in the air is ..... A) Oxygen. B) Carbon dioxide. C) Argon. D) Nitrogen. Show Answer Correct Answer: D) Nitrogen. 29. Statement 1:Police regulating traffic at a crowded crossing often wear a mask.Statement 2:Mask filters carbon dioxide and sends pure oxygen inside A) Both Statements are true. B) Both statements are false. C) Statement 1 is false and statement 2 is true. D) Statement 1 is true and statement 2 is false. Show Answer Correct Answer: D) Statement 1 is true and statement 2 is false. 30. What would most likely to happen if there is no air on Earth? A) Birds and bats would fly faster. B) The Earth would become lifeless. C) Only aquatic animals would survive. D) Only animals living in soil would survive. Show Answer Correct Answer: B) The Earth would become lifeless. 31. Air is made up of atoms and molecules. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 32. Which layer of the atmosphere contains the Ozone layer? A) Mesosphere. B) Exosphere. C) Thermosphere. D) Stratosphere. Show Answer Correct Answer: D) Stratosphere. 33. Raheem performs an experiment in a dark room, where all curtains are pulled down. He then open a small slit from the window such that a beam of sunlight could enter the room. He observes tiny shining particles moving in the beam of sunlight. What does the presence of these shining particles show? A) Air has water vapour. B) Air has nitrogen. C) Air has dust particles. D) Air has oxygen. Show Answer Correct Answer: C) Air has dust particles. 34. Why do the factories have long and tall chimney A) The Staff has problem. B) The boss wants long chimneys. C) To prevent dust and smoke. D) To pollute the earth. Show Answer Correct Answer: C) To prevent dust and smoke. 35. The Light is passed through object 'A' then 'A' is A) Translucent. B) Transparent. C) Opaque. D) None of the above. Show Answer Correct Answer: B) Transparent. 36. Plants and animals breathe in air. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 37. Oxygen is a supporter of A) Dust. B) Nitrogen. C) Smoke. D) Combustion. Show Answer Correct Answer: D) Combustion. 38. Which gas in the Atmosphere is essential for respirtion? A) Carbon Dioxide. B) Oxygen. C) Argon. D) Nitrogen. Show Answer Correct Answer: B) Oxygen. 39. Short form of Oxygen A) H2O. B) N. C) CO2. D) O2. Show Answer Correct Answer: D) O2. 40. Which of the following is an air pollutant? A) Carbon monooxide. B) Carbon dioxide. C) Oxygen. D) Nitrogen. Show Answer Correct Answer: A) Carbon monooxide. 41. Which gas in the atmosphere allows fires to burn? A) Nitrogen. B) Oxygen. C) Carbon dioxide. D) All of the above. Show Answer Correct Answer: B) Oxygen. 42. Why is it harder to breathe at the top of a mountain? A) There is less carbon dioxide. B) There is more oxygen. C) There is less oxygen. D) There is more carbon dioxide. Show Answer Correct Answer: C) There is less oxygen. 43. What is a major part of air which doesn't support a burning candle? A) Nitrogen. B) Oxygen. C) Helium. D) None of the above. Show Answer Correct Answer: A) Nitrogen. 44. In a number of musical instruments, air plays an important role. Can you name some such instrument? A) Drums. B) Flute. C) Piano. D) Violin. Show Answer Correct Answer: B) Flute. 45. Air is present in(a) atmosphere(b) soil(c) water of ponds, lakes and seas(d) everywhere A) B. B) A. C) C. D) D. Show Answer Correct Answer: D) D. 46. Who proved that air is a mixture of many gases??? A) Albert Einstein. B) Lavoani. C) Stewphan Hawking. D) None of the above. Show Answer Correct Answer: B) Lavoani. 47. WHEN THE BOTTLE IS TILTED THE AIR WAS ABLE TO COME OUT IN THE FROM OF? A) VAPOUR. B) GAS. C) SMOKE. D) BUBBLES. Show Answer Correct Answer: D) BUBBLES. 48. Fill in the blank:Mountaineers carry oxygen ..... with them, while climbing high mountains. A) Cylinders. B) Road. C) Oxygen. D) Mixture. Show Answer Correct Answer: A) Cylinders. 49. Which gas in the atmosphere is essential for respiration? A) Nitrogen. B) Oxygen. C) Argon. D) Carbon dioxide. Show Answer Correct Answer: B) Oxygen. 50. What percentage of Oxygen is present in the inhaled air? A) 100%. B) 21%. C) 1%. D) 78%. Show Answer Correct Answer: B) 21%. 51. Which of the following is very rare in atmosphere?? A) Hydrogen. B) Nitrogen. C) Helium. D) Carbon dioxide. Show Answer Correct Answer: A) Hydrogen. 52. The two gases which together make up about 99 per cent of the air are A) Nitrogen and carbon dioxide. B) Nitrogen and ozone. C) Nitrogen and oxygen. D) Carbon dioxide and oxygen. Show Answer Correct Answer: C) Nitrogen and oxygen. 53. Tick the correct percentage of gases present in air A) Nitrogen 78%, Oxygen 21%, Other gases 1%. B) Nitrogen 78%, carbon dioxide 21%, other gases 1%. C) Oxygen 78%, Nitrogen 21%, Other gases 1%. D) Carbon Dioxide 78%, Oxygen 21%, other gases 1%. Show Answer Correct Answer: A) Nitrogen 78%, Oxygen 21%, Other gases 1%. 54. The atmosphere is A) A layer or air. B) A layer of clouds. C) A layer of water. D) None of above. Show Answer Correct Answer: A) A layer or air. ← PreviousRelated 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 6Class 6 Science Chapter 15 Air Around Us Quiz 7 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books