This quiz works best with JavaScript enabled. Home > Class 6 > Class 6 Science Chapter 15 Air Around Us – Quiz 19 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 6 Science Chapter 15 Air Around Us Quiz 19 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which gas is produced by plants during photosynthesis?(a) Nitrogen(b) Carbon Dioxide(c) Hydrogen(d) Oxygen A) A. B) B. C) C. D) D. Show Answer Correct Answer: D) D. 2. Oxygen is produced in the process of in plants. A) Transpiration. B) Photosynthesis. C) Respiration. D) Geotropism. Show Answer Correct Answer: B) Photosynthesis. 3. Which gas plants cannot absorb directly? A) Carbon Dioxide. B) Oxygen. C) Nitrogen. D) Methane. Show Answer Correct Answer: C) Nitrogen. 4. Nitrogen covers ..... % of air A) 76%. B) 75%. C) 38%. D) 78%. Show Answer Correct Answer: D) 78%. 5. Smoke is ..... A) Good for health. B) Bad for health. C) Harmful for health. D) Both c&a. Show Answer Correct Answer: C) Harmful for health. 6. 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. 7. The animals living in water use the dissolved ..... in water for respiration. A) Nitrogen. B) Carbon dioxide. C) Oxygen. D) Hydrogen. Show Answer Correct Answer: C) Oxygen. 8. What do animals exhale? A) Carbon Dioxide. B) Oxygen. C) Nitrogen. D) None of the above. Show Answer Correct Answer: A) Carbon Dioxide. 9. Aquatic plant and anmials use ..... to respire. A) Dissolved oxygen. B) Dissolved nitrogen. C) Dissolved water. D) Dissovled carbon dixode. Show Answer Correct Answer: A) Dissolved oxygen. 10. 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. 11. What is the gaseous form of water? A) Carbon Monoxide. B) Water Vapor. C) Xenon. D) Ozone. Show Answer Correct Answer: B) Water Vapor. 12. 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) B. C) C. D) D. Show Answer Correct Answer: C) C. 13. 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. 14. How Much Percentage of Nitrogen is in Earth? A) 74.3%. B) 80%. C) 78%. D) 71.4%. Show Answer Correct Answer: C) 78%. 15. 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. 16. ..... could increase the amount of oxygen in the air. A) Building more houses. B) Burning more oil. C) Paving more streets. D) Planting more trees. Show Answer Correct Answer: D) Planting more trees. 17. What is the gas that plants take in for making food? A) Oxygen. B) Carbon Dioxide. C) Ozone. D) Carbon Monoxide. Show Answer Correct Answer: B) Carbon Dioxide. 18. On ISA / THE A) Element. B) Mixture. C) Compound. D) None of these. Show Answer Correct Answer: B) Mixture. 19. Bubble is made of what? A) Both 3 & 4. B) Nothing. C) Air. D) Water. Show Answer Correct Answer: A) Both 3 & 4. 20. The thick layer Earth is surrounded by is? A) Thermosphere. B) Lithosphere. C) Hydosphere. D) Atmosphere. Show Answer Correct Answer: D) Atmosphere. 21. The gas present in the maximum amount in the air is ..... A) Nitrogen. B) Carbon dioxide. C) Argon. D) Oxygen. Show Answer Correct Answer: A) Nitrogen. 22. 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. 23. 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. 24. 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. 25. Which layer of the atmosphere contains the Ozone layer? A) Exosphere. B) Thermosphere. C) Mesosphere. D) Stratosphere. Show Answer Correct Answer: D) Stratosphere. ← 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