This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Geography Chapter 4 Air – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Geography Chapter 4 Air Quiz 20 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Impurities that do not dissolve in water are called ..... A) Soluble Impurities. B) Insoluble Impurities. C) Germs. D) None of the above. Show Answer Correct Answer: B) Insoluble Impurities. 2. What are the pollutants known to cause acid rain? A) Nitrogen oxides and sulfur dioxide (sulfur compounds). B) Low pH and Acid. C) Lemon Juice and Battery Acid. D) Particulate Matter and Carbon Dioxide. Show Answer Correct Answer: A) Nitrogen oxides and sulfur dioxide (sulfur compounds). 3. Air is a ..... A) Mixture. B) Compound. C) Element. D) None of these. Show Answer Correct Answer: A) Mixture. 4. Air pressure is greater ..... A) At the top of the mountain. B) At the bottom of the mountain. C) At the center of the mountain. D) None of the above. Show Answer Correct Answer: B) At the bottom of the mountain. 5. The effective temperature increases with a decrease in relative humidity at the same DBT. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 6. Which gas is the main contributor to the problem of global warming? A) CFCs. B) Carbon dioxide. C) Ozone. D) Carbon monoxide. Show Answer Correct Answer: B) Carbon dioxide. 7. I ..... online the day before I was going to fly. A) Filled out. B) Checked in. C) Got on. D) Picked up. Show Answer Correct Answer: B) Checked in. 8. Why air is important? A) For breathing. B) For burning. C) All of these. D) Non. Show Answer Correct Answer: B) For burning. 9. Which air pollutant is a toxic, colorless and odorless gas that is dangerous to breath in? A) Sulphur dioxide. B) Carbon dioxide. C) Methane. D) Carbon monoxide. Show Answer Correct Answer: D) Carbon monoxide. 10. A body of air that has the same level of temperature and humidity. A) Front. B) Air Mass. C) Occluded front. D) Maritime polar. Show Answer Correct Answer: B) Air Mass. 11. ..... is all around us. A) Air. B) Wind. C) Fire. D) None of the above. Show Answer Correct Answer: A) Air. 12. The weight of air on a unit area of the earth is called as ..... A) Pressure Gradient. B) Air Pressure/Atmospheric Pressure. C) All the above. D) None of the above. Show Answer Correct Answer: B) Air Pressure/Atmospheric Pressure. 13. Which expression means that your plane will take off later than planned? A) It is canceled. B) It is lately. C) It is late. D) It is delayed. Show Answer Correct Answer: D) It is delayed. 14. The ozone layer is damaged by (a) A) A. CFCs. B) Increase in greenhouse gases. C) Increased global temperatures. D) Sulfuric and nitric acids. Show Answer Correct Answer: A) A. CFCs. 15. Air becomes dirty because of dust and ..... gases. A) Harmful. B) Useful. C) Fresh. D) Colourful. Show Answer Correct Answer: A) Harmful. 16. In rainy season brown layer appears on iron objects, which part of air reacts with iron to form this layer? A) Carbon dioxide. B) Nitrogen. C) Oxygen. D) None of the above. Show Answer Correct Answer: C) Oxygen. 17. The main gas for breathe is A) Nitrogen. B) Oxygen. C) Argon. D) Hydrogen. Show Answer Correct Answer: B) Oxygen. 18. Which among the following is the secondary air pollutants? A) Smog. B) Hydrocarbons. C) Particulate matter. D) Nitrogen oxides. Show Answer Correct Answer: A) Smog. 19. What is the movement of cold fronts? A) Cold fronts move quickly and can cause abrupt changes in weather. B) Cold fronts move upwards and cause no change in weather. C) Cold fronts move in a circular pattern and bring warm weather. D) Cold fronts move slowly and have minimal impact on weather. Show Answer Correct Answer: A) Cold fronts move quickly and can cause abrupt changes in weather. 20. What do we have to fasten on the plane? A) The safe belt. B) The safety belt. C) The conveyor belt. D) The security belt. Show Answer Correct Answer: B) The safety belt. 21. Air exects ..... on objects A) Pressure. B) Space. C) Mass. D) None of the above. Show Answer Correct Answer: A) Pressure. 22. In this layer of the atmosphere, meteoroids slow down and burn up. A) Stratosphere. B) Exosphere. C) Mesosphere. D) Troposphere. Show Answer Correct Answer: C) Mesosphere. 23. The ..... in the air causes rainfall. A) Oxygen. B) Water vapour. C) Nitrogen. D) None of the above. Show Answer Correct Answer: B) Water vapour. 24. Air has colour. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 25. Is air a mixture or compound? A) Mixture. B) Compound. C) All the above. D) None of the above. Show Answer Correct Answer: A) Mixture. ← PreviousNext →Related QuizzesClass 7 Geography Chapter 4 Air Quiz 1Class 7 Geography Chapter 4 Air Quiz 2Class 7 Geography Chapter 4 Air Quiz 3Class 7 Geography Chapter 4 Air Quiz 4Class 7 Geography Chapter 4 Air Quiz 5Class 7 Geography Chapter 4 Air Quiz 6Class 7 Geography Chapter 4 Air Quiz 7Class 7 Geography Chapter 4 Air Quiz 8Class 7 Geography Chapter 4 Air Quiz 9Class 7 Geography Chapter 4 Air Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books