Air and its Uses
Q.1. Give two properties of air.
Q.2. Name some materials in which air can be filled.
Q.3. Why does a balloon expand when air is filled in it?
Q.4. Name some substances in which air can be used to draw liquids?
Q.5. Explain the principle of working of medicine droppers and ink fillers.
Q.6. Explain the working of a common lift pump.
Q.7. What is air?
Q.8. Which air is breathed in and given out during respiration?
Q.9. Why do mountaineers take oxygen cylinders with them while climbing mountains?
Q.10. Which gas is essential for burning?
Q.11. Which gas is essential for plant growth?
Q.12. Which gas makes the soil fertile?
Q.13. Name some common nitrogenous fertilizers?
Q.14. What is the use of carbon dioxide for plants?
Q.15. What is photosynthesis?
Q.16. Which gas is used in a fire extinguisher?
Q.17. What is air pollution?
Q.18. What are air pollutants? Name some air pollutants?
Q.19. Name three gases present in air?
Q.20. Name some establishments that produce smoke which pollutes the air.
Q.21. What are the harmful effects of air pollution?
Q.22. Which gas reduces the oxygen carrying capacity of the blood?
Q.23. What is the effect of sulphur dioxide on the body?
Q.24. What are the effects of sulphur dioxide other than the body?
Q.25. What are the sources of sulphur dioxide?
Q.26. What is the effect of nitrogen dioxide on animals and plants?
Q.27. What causes lung fibrosis or pneumoconiosis?
Q.28. How can the effect of air pollution be minimised?
Q.29. What precautions should be taken with automobiles to reduce air pollution?
Q.30. What should be used for dust to reduce air pollution?
Q.31. What should be used for finer particles to reduce air pollution?
Q.32. What should be used for mist and fogs to reduce air pollution?
