Unit 4. class 8th General Science Leave a Comment / Science Preparation quiz for etea and other competitive exams. Class 8th General Science, Unit4 Pollution and their effects on the environment. 0% 2 General Science Unit 4. Class 8th General Science Unit 4. pollution and their effect on the environment. Class 8th General Science 1 / 40 1. Atmosphere consist of 78% nitrogen, 21% oxygen, 1% argon and 0.03%...... A. Carbon dioxide B. hydrogen 2 / 40 2. The addition of certain contaminants or pollutants to the environment is called A. pollination B. Pollution 3 / 40 3. Pollution began to be recognized as a serious threat during the industrial revolution of the A. 18th century B. 19th century 4 / 40 4. CNCS means A. Carbon Monoxide, Oxides of nitrogen, CFCs, sulphur dioxide B. Carbon dioxide, Oxides of nitrogen, sulphur dioxide, Carbon Monoxide 5 / 40 5. Sulphur dioxide is produced as a result of various A. Physical change B. industrial process 6 / 40 6. The key source of sulphur dioxide include A. Coal and petroleum B. coal and oil 7 / 40 7. Smoke release from thermal power plants contains A. SO2 B. CO 8 / 40 8. Oxidation of SO2 forms A. CFCs B. HâSOâ 9 / 40 9. Lungs cancer is caused by A. Sulphur dioxide B. Oxides of Nitrogen 10 / 40 10. Cardiovascular diseases are caused by A. Sulphur dioxide B. Oxides of Nitrogen 11 / 40 11. Destroys chloroplast in plants A. Oxides of Nitrogen B. Sulphur dioxide 12 / 40 12. ..... can be observed as a brown haze above the cities A. Nitrogen dioxide NO2 B. sulphur dioxide 13 / 40 13. Coal and oil are burnt at high temperature in industries and engines of vehicles. A. sulphur dioxide B. Nitrogen dioxide NO2 14 / 40 14. can caused heart failure. A. Nitrogen dioxide NO2 B. sulphur dioxide 15 / 40 15. is a colorless, odourless, non-irritating but very poisonous gas. A. Carbon Monoxide CO B. CFCs 16 / 40 16. is produced by the incomplete combustion of coal and other fossil fuels. A. CFCs B. Carbon Monoxide CO 17 / 40 17. Smoke released from motor vehicles and industries is the main source of A. Carbon Monoxide CO B. CFCs 18 / 40 18. Damage to the central nervous system A. CFCs B. Carbon Monoxide CO 19 / 40 19. Reducting in the oxygen-carrying capacity of hemoglobin. A. Carbon Monoxide CO B. CFCs 20 / 40 20. are the main cause of Skin cancer. A. Carbon Monoxide CO B. CFCs 21 / 40 21. Compound of chlorine, fluorine, and carbon atoms. A. Carbon Monoxide CO B. CFCs 22 / 40 22. Major cause breaks down of ozone layer. A. Carbon Monoxide CO B. CFCs 23 / 40 23. are used in aerosol spray, as a cooling agent in refrigerators, AC, and foam packing. A. CFCs B. Carbon Monoxide CO 24 / 40 24. Chemical reactions involving air pollutants can create acidic rain compounds A. Eutrophication B. Acid rain 25 / 40 25. can cause damage to vegetation and buildings. A. Acid rain compounds B. Eutrophication 26 / 40 26. can destroy leaves of plants. A. Eutrophication B. Acid rain 27 / 40 27. the result of excessive oxides of carbon, sulphur, nitrogen, and smoke in the atmosphere. A. Acid rain B. Eutrophication 28 / 40 28. Stone buildings are corroded called stone cancer by A. Acid rain B. Eutrophication 29 / 40 29. Kill aquatic life, destroy leaves and bark, corrodes the metals and stones of buildings, damage the Crops by A. Acid rain B. Eutrophication 30 / 40 30. Ozone is a Greek word which means A. Strong odour B. weak odour 31 / 40 31. Ozone made of ... oxygen atoms O3 A. three B. Two 32 / 40 32. The upper part of the atmosphere has a high concentration of ozone molecules, known as the ozone layer or A. ozone sphere B. Ozone room 33 / 40 33. One .... molecule from CFCs can destroy up to 100,000 ozone molecules. A. fluorine B. Chlorine 34 / 40 34. At least 25% of the total area of a country must be covered by forest but in Pakistan, only ..... of the total area is covered A. 5% B. 3.4% 35 / 40 35. Oxygen, freshwater, solar energy, timber, and biomass are A. Renewable resources B. non-renewable resources 36 / 40 36. Fossil fuels, metal ores, and groundwater are A. non-renewable resources B. Renewable resources 37 / 40 37. Rain can Carry oxides of nitrogen to rivers and soil, which can lead to abnormal growth of algae, this is called A. acid rain B. Eutrophication 38 / 40 38. Greenhouse gases are Carbon (Co2), methane, oxides of nitrogen, water vapors, ozone and oxygen A. CMNOw B. cmnw 39 / 40 39. Global warming and climate change is due to A. Green house gases B. nobal gases 40 / 40 40. which of the following is not a greenhouse gas: A. methane B. Carbon dioxide C. Sulphur dioxide D. Nitrogen Your score is The average score is 95% LinkedIn Facebook Twitter VKontakte 0% Restart quiz