This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part Ii > Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Where must wastewater be treated before being released into rivers or lakes? A) Water reservoirs. B) Sewage plants. C) Ocean dumping sites. D) Wastewater treatment plants. Show Answer Correct Answer: D) Wastewater treatment plants. 2. The loss or reduction of chlorophyll in the leaves is due to A) Bleaching by sulphur dioxide. B) Bleaching by chlorine. C) Reduction by chlorofluorocarbons. D) Oxidation by NO2. Show Answer Correct Answer: A) Bleaching by sulphur dioxide. 3. What role do methane emissions play in climate change? A) Methane emissions have no impact on climate change. B) Methane is a beneficial gas that cools the atmosphere. C) Methane emissions are primarily caused by solar activity. D) Methane emissions significantly contribute to climate change by acting as a potent greenhouse gas that traps heat in the atmosphere. Show Answer Correct Answer: D) Methane emissions significantly contribute to climate change by acting as a potent greenhouse gas that traps heat in the atmosphere. 4. Which of the following strategies would have the most direct impact reducing air pollution? A) Driving electric cars. B) Reusing waste materials. C) Recycling trash. D) Investing in fossil fuel burning technologies. Show Answer Correct Answer: A) Driving electric cars. 5. Pollutants being broken down by organisms such as bacteria and fungi is known as ..... A) Phytoremediation. B) Photolysis. C) Biomagnification. D) Biodegradation. Show Answer Correct Answer: D) Biodegradation. 6. The probability of an unwanted outcome ..... A) Impossibility. B) Certainty. C) Risk. D) Guarantee. Show Answer Correct Answer: C) Risk. 7. Study of deleterious effects of chemical agents on all living systems A) Poisonous. B) Hazardous. C) Exposure. D) Toxicology. Show Answer Correct Answer: D) Toxicology. 8. Given the K$_{sp}$ of PbBr$_{2}$ is 6.3 x 10$^{-6}$, calculate the solubility of PbBr$_{2}$ in water. A) 0.01865 mol/L. B) 0.01178 mol/L. C) 0.00063 mol/L. D) 0.00034 mol/L. Show Answer Correct Answer: B) 0.01178 mol/L. 9. The higher concentration of which gas in air can cause stiffness of flower buds?(a) SO$_{2}$(b) CO(c) NO$_{2}$(d) CO$_{2}$ A) B. B) D. C) C. D) A. Show Answer Correct Answer: D) A. 10. Photosynthesis by plants A) Uses up carbon dioxide and produces oxygen. B) Uses up oxygen and produces ammonia. C) Uses up carbon dioxide and produces methane. D) Uses up oxygen and produces carbon dioxide. Show Answer Correct Answer: A) Uses up carbon dioxide and produces oxygen. 11. What is one of the uses of DDT? A) To enhance plant growth. B) To exterminate mosquitoes, which carry malaria. C) To purify water. D) To fertilize crops. Show Answer Correct Answer: B) To exterminate mosquitoes, which carry malaria. 12. Which process does NOT affect the composition of water? A) Ion exchange. B) Dissolution. C) Recombination. D) Hydrothermal activity. Show Answer Correct Answer: C) Recombination. 13. An example of anthropogenic VOC is A) Methylbutanol. B) Formaldehyde. C) 3-carene. D) Limonene. Show Answer Correct Answer: B) Formaldehyde. 14. What does acid rain consist of? A) Sulfur Dioxide and Oxygen. B) Sulfur Dioxide and Nitrogen Oxide. C) Carbon and Nitrogen Oxides. D) Sulfur Dioxide and Carbon. Show Answer Correct Answer: B) Sulfur Dioxide and Nitrogen Oxide. 15. Which of these helps reduce emissions? A) Plastic bags. B) Electric cars. C) Coal plants. D) Landfilling waste. Show Answer Correct Answer: B) Electric cars. 16. Apa itu bioakumulasi dan bagaimana hubungannya dengan toksikologi? A) Bioakumulasi mengacu pada pemecahan racun di lingkungan. B) Bioakumulasi adalah akumulasi zat beracun dalam organisme, relevan dengan toksikologi karena dapat menyebabkan peningkatan toksisitas dan risiko kesehatan. C) Bioakumulasi tidak ada hubungannya dengan toksikologi dan tidak memiliki implikasi kesehatan. D) Bioakumulasi adalah proses detoksifikasi zat berbahaya dalam organisme. Show Answer Correct Answer: B) Bioakumulasi adalah akumulasi zat beracun dalam organisme, relevan dengan toksikologi karena dapat menyebabkan peningkatan toksisitas dan risiko kesehatan. 17. Which type of pollution control device removes particulates from factory emissions? A) Gas scrubber. B) Cyclone separator. C) Electrostatic precipitator. D) Incinerator. Show Answer Correct Answer: C) Electrostatic precipitator. 18. Ca(OH)$_{2 }$is an example of a(n) A) Acid. B) Base. C) Neutral. D) None of the above. Show Answer Correct Answer: B) Base. 19. Which of the following roles is played by carbohydrates in human nutrition? A) Act as an energy source. B) Assist enzyme function. C) Structural component of cells in the body. D) Storage form of unused chemical energy. Show Answer Correct Answer: A) Act as an energy source. 20. Name the poverty that is defined from social perspective ie., living standard is compared to the economic standards of population living in the surroundings A) Absolute poverty. B) Relative poverty. C) Generational poverty. D) Situational poverty. Show Answer Correct Answer: B) Relative poverty. 21. Plants take in water from the soil through a special kind of diffusion called ..... A) Filtration. B) Osmosis. C) Active transport. D) Photolysis. Show Answer Correct Answer: B) Osmosis. 22. Cyanide affects cattle through which of the following? A) Water. B) Apple tree leave. C) Hay. D) Vegetables. Show Answer Correct Answer: B) Apple tree leave. 23. Which option correctly matches the term with its description:hazardous chemicals? A) Substances that spread out from high to low concentration. B) Substances that can harm health or the environment. C) Elements plants and animals need, like nitrogen and phosphorus. D) Chemicals that always have a pH of 7. Show Answer Correct Answer: B) Substances that can harm health or the environment. 24. Which international treaty indirectly controls acid deposition? A) Montreal Protocol. B) Gothenburg Protocol. C) Stockholm Convention. D) Kyoto Protocol. Show Answer Correct Answer: B) Gothenburg Protocol. 25. *Ground Level Ozone causes: A) Asthma. B) Death. C) Smog. D) Acid Rain. Show Answer Correct Answer: A) Asthma. 26. Which of the following is an advantage of hard water? A) Causes limescale. B) Provides calcium for teeth and bones. C) Wastes soap. D) Is corrosive. Show Answer Correct Answer: B) Provides calcium for teeth and bones. 27. Which of the following concentrations is higher? A) 200 ppm. B) 0.2 ppm. C) 2.2 ppm. D) 20.2 ppm. Show Answer Correct Answer: A) 200 ppm. 28. What is found to be an effective material to make municipal and industrial waste water clean? A) Chlorine. B) Powder of kernel of tamarind seeds. C) Calcium hypochlorite. D) Carbon dioxide. Show Answer Correct Answer: B) Powder of kernel of tamarind seeds. 29. What is the main purpose of using catalytic converters in vehicles? A) To convert harmful gases into less harmful substances. B) To increase fuel efficiency. C) To improve engine performance. D) To reduce noise pollution. Show Answer Correct Answer: A) To convert harmful gases into less harmful substances. 30. What should be done to ensure a site is no longer dangerous to human health and the environment? A) Increase industrial activity. B) Ensure the solution worked. C) Ignore environmental regulations. D) Expand the site. Show Answer Correct Answer: B) Ensure the solution worked. 31. Harmful UV-radiation is blocked by ozone layer in the A) Troposphere. B) Stratosphere. C) Mesosphere. D) Thermosphere. Show Answer Correct Answer: B) Stratosphere. 32. Why is water vapor not included in the composition of dry air? A) It is not a gas. B) It is highly reactive. C) It is not found in the atmosphere. D) It varies in amount from place to place. Show Answer Correct Answer: D) It varies in amount from place to place. 33. Which of these is a well known carcinogen often found in mine tailings? A) Mercury. B) Asbestos. C) Arsenic. D) Lead. Show Answer Correct Answer: C) Arsenic. 34. What is the primary cause of smog formation in urban areas? A) Vehicle emissions. B) High humidity. C) Ocean currents. D) Natural vegetation. Show Answer Correct Answer: A) Vehicle emissions. 35. What is the role of yeast in the materials list? A) To change the color of the water. B) To represent oil. C) To act as a cleaning agent. D) To be used in bioremediation. Show Answer Correct Answer: D) To be used in bioremediation. 36. A metal (Metal Y) reacts with both copper sulfate solution and zinc sulfate solution. What does this indicate about its reactivity? A) It is more reactive than both zinc and copper. B) It is less reactive than both zinc and copper. C) It is more reactive than copper but less reactive than zinc. D) It is more reactive than zinc but less reactive than copper. Show Answer Correct Answer: A) It is more reactive than both zinc and copper. 37. What might happen if oil reaches land, based on the experiment's context? A) It turns into water. B) It remains stuck to surfaces. C) It becomes solid. D) It evaporates immediately. Show Answer Correct Answer: B) It remains stuck to surfaces. 38. Liming is the term given to the process of adding lime to the environment to decrease its pH A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 39. Which action reduces your carbon footprint? A) Wasting food. B) Driving alone. C) Using LED bulbs. D) Burning coal. Show Answer Correct Answer: C) Using LED bulbs. 40. Which is NOT an effect of an increase in global temperatures? A) Rise in ocean levels. B) Stronger hurricanes. C) Changes in the amount of rainfall. D) Diversification of animal species. Show Answer Correct Answer: D) Diversification of animal species. 41. *What depletes ozone (O3)? A) CFC's. B) Sunlight. C) Greenhouse Gases. D) DDT. Show Answer Correct Answer: A) CFC's. 42. The burning of fossil fuels releases large quantities of A) Sulfur. B) Methane. C) Oxygen. D) Carbon dioxide. Show Answer Correct Answer: D) Carbon dioxide. 43. What gas makes up 21% of Earth's Atmosphere? A) Nitrogen. B) Oxygen. C) Ozone. D) None of the Above. Show Answer Correct Answer: B) Oxygen. 44. The main reason we need carbohydrates is because A) They help protect organs. B) They store energy. C) They are delicious. D) They are the main source of energy. Show Answer Correct Answer: D) They are the main source of energy. 45. Undissolved material from your kitchen bathroom or laundry A) Effluent. B) Storm water. C) Sewage. D) Run off. Show Answer Correct Answer: C) Sewage. 46. The extinction of lion tailed Macaque is one of the factors that led to the movement of A) Save Ganga Movement. B) Bishnoi Movement. C) Silent Valley Movement. D) ChipkoMovement. Show Answer Correct Answer: C) Silent Valley Movement. 47. Which of the following would decrease concentration of pollutants? A) Biomagnification. B) Deposition. C) Dilution. D) Inhalation. Show Answer Correct Answer: C) Dilution. 48. Which gas produced by the combustion of fossil fuels causes acid rain? A) Sulfur dioxide. B) Oxygen. C) Ozone. D) Nitrogen. Show Answer Correct Answer: A) Sulfur dioxide. 49. A pesticide that kills or controls weeds is called a(an) A) Fungicide. B) Herbicide. C) Insecticide. D) Weedicide. Show Answer Correct Answer: B) Herbicide. 50. How does ozone protect life on Earth? A) Provides oxygen for respiration. B) Traps carbon dioxide. C) Enhances greenhouse effect. D) Absorbs ultraviolet radiation. Show Answer Correct Answer: D) Absorbs ultraviolet radiation. 51. Ozone layer is present in A) Stratosphere. B) Troposphere. C) Thermosphere. D) Mesosphere. Show Answer Correct Answer: A) Stratosphere. 52. How is the purity of a water sample tested? A) By filtering it through carbon to see if it tastes better. B) By checking for a fixed boiling point of exactly 100$^\circ$C. C) By adding anhydrous cobalt(II) chloride paper. D) By adding chlorine to see if microbes are killed. Show Answer Correct Answer: B) By checking for a fixed boiling point of exactly 100$^\circ$C. 53. What is crude oil primarily composed of? A) Hydrocarbons. B) Carbohydrates. C) Proteins. D) Nucleic acids. Show Answer Correct Answer: A) Hydrocarbons. 54. Which heavy metal is used as a wood preservative? A) Arsenic. B) Mercury. C) Cadmium. D) Lead. Show Answer Correct Answer: A) Arsenic. 55. Which statement best describes water quality monitoring? A) It focuses only on the color and clarity of water. B) It measures chemical, physical, and biological indicators to assess health of ecosystems and human use. C) It relies solely on the presence of fish species to judge safety. D) It is done only for drinking water and not for recreation or agriculture. Show Answer Correct Answer: B) It measures chemical, physical, and biological indicators to assess health of ecosystems and human use. 56. Why is fluoride added to drinking water? A) To prevent tooth decay. B) To raise the pH. C) To prevent algae growth. D) To soften the water. Show Answer Correct Answer: A) To prevent tooth decay. 57. What is the minimum dissolved oxygen concentration required for fish to survive in water? A) 9.2 ppm. B) 5 ppm. C) 2 ppm. D) 11.3 ppm. Show Answer Correct Answer: B) 5 ppm. 58. Which of the following tools can be used to measure pH? A) PH meter. B) Thermometer. C) Stopwatch. D) Ruler. Show Answer Correct Answer: A) PH meter. 59. Which gas has the highest contribution to global warming? A) Oxygen. B) Nitrogen. C) Carbon dioxide. D) Neon. Show Answer Correct Answer: C) Carbon dioxide. 60. What is the measure of the concentration of hydrogen ions in a solution called? A) PH. B) Volume. C) Density. D) Temperature. Show Answer Correct Answer: A) PH. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 1Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 2Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 4Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 5Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 6Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 7Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 8Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books