This quiz works best with JavaScript enabled. Home > Class 6 > Class 6 Science Chapter 15 Air Around Us – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 6 Science Chapter 15 Air Around Us Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. State true or false air exerts pressure A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 2. Dose air has weight? A) NO. B) Yes. C) Both a & b. D) None of the above. Show Answer Correct Answer: B) Yes. 3. This gas pollutes the enviroment. A) Carbon dioxide. B) Hydrogen. C) Oxygen. D) Nitrogen. Show Answer Correct Answer: A) Carbon dioxide. 4. The component of air that supports burning is called ..... A) OXYGEN. B) NITROGEN. C) All the above. D) None of the above. Show Answer Correct Answer: A) OXYGEN. 5. Most of Earth's air is found close to the surface in the lowest level of the atmosphere called the Troposphere. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 6. What is % of Oxygen in Air A) 21%. B) 85%. C) 1%. D) None of the above. Show Answer Correct Answer: A) 21%. 7. Which of the following in not present in the atmosphere? A) Helium. B) Iron. C) Carbonate. D) Ozone. Show Answer Correct Answer: B) Iron. 8. The ..... makes the windmill rotate. A) Wind. B) Electricity. C) Petrol. D) Fuel. Show Answer Correct Answer: A) Wind. 9. For burig which gas in nessary A) Argon. B) Oxygen. C) Nitrogen. D) None of the above. Show Answer Correct Answer: B) Oxygen. 10. Which gas is released into the atmosphere by plants following photosynthesis? A) Oxygen. B) Argon. C) Carbon dioxide. D) Nitrogen. Show Answer Correct Answer: A) Oxygen. 11. What gas is released into the atmopshere when fossil fuels are burned? A) Oxygen. B) Carbon dioxide. C) Nitrogen. D) Argon. Show Answer Correct Answer: B) Carbon dioxide. 12. Which gas makes up 78% of the atmosphere? A) Ozone. B) Oxygen. C) Nitrogen. D) Water vapor. Show Answer Correct Answer: C) Nitrogen. 13. Which of These gases is present in the least quantity of air? A) Oxygen. B) Carbon Dioxide. C) Nitrogen. D) Nitrogen. Show Answer Correct Answer: B) Carbon Dioxide. 14. The balance in Oxygen and carbon di oxide is maintained by A) Evaporation and Photosynthesis. B) Transpiration and respiration. C) Photosynthesis and respiration. D) Combustion and hydrogenation. Show Answer Correct Answer: C) Photosynthesis and respiration. 15. What percentage of Nitrogen is there in the air? A) 78%. B) 23%. C) 28%. D) 87%. Show Answer Correct Answer: A) 78%. 16. Mountaineers carry ..... A) Oxygen cylinder. B) Nitrogen cylinder. C) Carbon dioxide cylinder. D) Water vapour cylinder. Show Answer Correct Answer: A) Oxygen cylinder. 17. The earthworms come out of the soil only during A) Very cold weather. B) Very hot weather. C) Very heavy rains Very little rains. D) None of the above. Show Answer Correct Answer: C) Very heavy rains Very little rains. 18. Clothes dry faster when there is ..... water vapor in air A) Less. B) More. C) Either less or more. D) None of these. Show Answer Correct Answer: A) Less. 19. Of What does the composition of air consist of? A) 99% Nitrogen, 0.5% Oxygen and 0.5% other gasses. B) 78% Nitrogen, 20% Oxygen and 2% other gasses. C) 78% Nitrogen, 21% Oxygen and 1% other gasses. D) 58% Nitrogen, 19% Oxygen and 23% other gasses. Show Answer Correct Answer: C) 78% Nitrogen, 21% Oxygen and 1% other gasses. 20. Plants and trees keep the air clean. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 21. Fish breath through? A) Lungs. B) Gills. C) All the above. D) None of the above. Show Answer Correct Answer: B) Gills. 22. Which form of air is used by the organisms in water? A) Atmospheric oxygen. B) Dissolved oxygen. C) All the above. D) None of the above. Show Answer Correct Answer: B) Dissolved oxygen. 23. Burning fuel produces A) Fog. B) Smoke. C) Smog. D) Rain. Show Answer Correct Answer: B) Smoke. 24. A ..... is an instrument used to show the direction of the wind. A) Pin wheel. B) Wind mill. C) Wind vane. D) Fan. Show Answer Correct Answer: C) Wind vane. 25. Water vapour present in the air supports water cycle. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. ← 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 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 10Class 6 Science Chapter 15 Air Around Us Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books