This quiz works best with JavaScript enabled. Home > Class 6 > Class 6 Science Chapter 15 Air Around Us – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 6 Science Chapter 15 Air Around Us Quiz 20 (24 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. ..... makes Windmill rotate A) Wind. B) Electricity. C) Solar energy. D) None of the above. Show Answer Correct Answer: A) Wind. 2. 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 oxygen. B) Air has nitrogen. C) Air has water vapour. D) Air has dust particles. Show Answer Correct Answer: D) Air has dust particles. 3. 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. 4. 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. 5. 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. 6. Oxygen is a supporter of A) Combustion. B) Nitrogen. C) Smoke. D) Dust. Show Answer Correct Answer: A) Combustion. 7. Which gas in the Atmosphere is essential for respirtion? A) Nitrogen. B) Oxygen. C) Carbon Dioxide. D) Argon. Show Answer Correct Answer: B) Oxygen. 8. Short form of Oxygen A) H2O. B) CO2. C) O2. D) N. Show Answer Correct Answer: C) O2. 9. Which of the following is an air pollutant? A) Carbon monooxide. B) Nitrogen. C) Carbon dioxide. D) Oxygen. Show Answer Correct Answer: A) Carbon monooxide. 10. 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. 11. Why is it harder to breathe at the top of a mountain? A) There is less oxygen. B) There is more oxygen. C) There is more carbon dioxide. D) There is less carbon dioxide. Show Answer Correct Answer: A) There is less oxygen. 12. 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. 13. In a number of musical instruments, air plays an important role. Can you name some such instrument? A) Flute. B) Drums. C) Piano. D) Violin. Show Answer Correct Answer: A) Flute. 14. Air is present in(a) atmosphere(b) soil(c) water of ponds, lakes and seas(d) everywhere A) A. B) B. C) C. D) D. Show Answer Correct Answer: D) D. 15. 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. 16. Define Density A) The weight of a column of air pushing down on an area. B) The Amount of Mass in a given volume. C) The force pushing on an area. D) The distance above sea level. Show Answer Correct Answer: B) The Amount of Mass in a given volume. 17. WHEN THE BOTTLE IS TILTED THE AIR WAS ABLE TO COME OUT IN THE FROM OF? A) GAS. B) SMOKE. C) VAPOUR. D) BUBBLES. Show Answer Correct Answer: D) BUBBLES. 18. Fill in the blank:Mountaineers carry oxygen ..... with them, while climbing high mountains. A) Oxygen. B) Mixture. C) Road. D) Cylinders. Show Answer Correct Answer: D) Cylinders. 19. Which gas in the atmosphere is essential for respiration? A) Oxygen. B) Nitrogen. C) Carbon dioxide. D) Argon. Show Answer Correct Answer: A) Oxygen. 20. What percentage of Oxygen is present in the inhaled air? A) 21%. B) 78%. C) 1%. D) 100%. Show Answer Correct Answer: A) 21%. 21. Which of the following is very rare in atmosphere?? A) Nitrogen. B) Carbon dioxide. C) Hydrogen. D) Helium. Show Answer Correct Answer: C) Hydrogen. 22. 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. 23. Tick the correct percentage of gases present in air A) Oxygen 78%, Nitrogen 21%, Other gases 1%. B) Carbon Dioxide 78%, Oxygen 21%, other gases 1%. C) Nitrogen 78%, carbon dioxide 21%, other gases 1%. D) Nitrogen 78%, Oxygen 21%, Other gases 1%. Show Answer Correct Answer: D) Nitrogen 78%, Oxygen 21%, Other gases 1%. 24. 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 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