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 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 6 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A smoker with a high tolerance to nicotine is most likely: A) Unable to quit without support. B) Not addicted. C) An occasional smoker. D) Experiencing withdrawal. Show Answer Correct Answer: A) Unable to quit without support. 2. What are the consequences of losing biodiversity in an ecosystem? A) Improved climate regulation and balance. B) Enhanced species diversity and resilience. C) Increased food production and stability. D) Consequences include ecosystem instability, loss of services, and increased vulnerability to changes. Show Answer Correct Answer: D) Consequences include ecosystem instability, loss of services, and increased vulnerability to changes. 3. Methane is a compound containing A) 1 carbon atom and 1 hydrogen atom. B) 1 carbon atom and 2 hydrogen atoms. C) 1 carbon atom and 3 hydrogen atoms. D) 1 carbon atom and 4 hydrogen atoms. Show Answer Correct Answer: D) 1 carbon atom and 4 hydrogen atoms. 4. Which of the following statement about the LD50 is correct? A) The more toxic a substance is, the higer its LD50 would be. B) LD50 is a measurement to COMPARE the toxicity with other substances. C) LD50 stands for Lethal dose 50. D) LD50 stands for Lethal dose 50 mg/L. Show Answer Correct Answer: B) LD50 is a measurement to COMPARE the toxicity with other substances. 5. In which cells are electrical energy used to drive non-spontaneous redox reaction? A) Anode. B) Galvanic. C) Electron. D) Electrolytic. Show Answer Correct Answer: D) Electrolytic. 6. T/F:Nutrients the body needs in small amounts if called a micronutrient. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. What is released at the cathode during aluminium extraction? A) Oxygen. B) Aluminium. C) Carbon dioxide. D) Hydrogen. Show Answer Correct Answer: A) Oxygen. 8. The amount of oxygen required by bacteria to breakdown the organic matter present in a certain volume of a sample of water is ..... A) Eutrophication. B) Biochemical Oxygen Demand. C) Incineration. D) None of the above. Show Answer Correct Answer: B) Biochemical Oxygen Demand. 9. Which statement best explains biomagnification as presented? A) The breakdown of chemicals by sunlight. B) The build-up of hazardous chemicals in food chains, such as mercury in fish. C) The absorption of chemicals by plant roots only. D) The dilution of chemicals in air and water. Show Answer Correct Answer: B) The build-up of hazardous chemicals in food chains, such as mercury in fish. 10. This type of solutions tastes bitter. A) Acids. B) Bases. C) None of the following. D) Acids & Bases. Show Answer Correct Answer: B) Bases. 11. Which natural source contributes to air pollution? A) Forest fires. B) Plastic waste. C) Vehicle exhaust. D) Industrial emissions. Show Answer Correct Answer: A) Forest fires. 12. What does effluent mean? A) A body of water has too much nutrients. B) A body of water is overpopulated with pathogens. C) Sewage and other wastes disposed into a body of water. D) A body of water is too acidic or basic. Show Answer Correct Answer: C) Sewage and other wastes disposed into a body of water. 13. What is the guideline level for dissolved oxygen in water? A) 20-30 mg/L. B) 50-60 mg/L. C) 8-10 mg/L. D) 0-2 mg/L. Show Answer Correct Answer: C) 8-10 mg/L. 14. What is a debated concern regarding incinerators? A) Their efficiency in recycling. B) Their safety. C) Their ability to reduce landfill waste. D) Their cost-effectiveness. Show Answer Correct Answer: B) Their safety. 15. What is the main source of lead contamination in the atmosphere? A) Burning of fossil fuels. B) Volcanic eruptions. C) Industrial waste. D) Deforestation. Show Answer Correct Answer: A) Burning of fossil fuels. 16. Which of the following conditions in drinking water causes methemoglobinemia?(a) > 50 ppm of chloride(b) > 50 ppm of nitrate(c) > 50 ppm of lead(d) > 100 ppm of sulphate A) D. B) A. C) C. D) B. Show Answer Correct Answer: D) B. 17. True or False. The acidity of a substance is based on the concentration of carbon atoms that it has. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 18. The products of incomplete combustion are ..... A) Carbon dioxide and water. B) Carbon monoxide and water. C) Carbon and oxygen. D) None of the above. Show Answer Correct Answer: B) Carbon monoxide and water. 19. The dry deposition rate depends on: A) Rain intensity. B) Wind speed and particle size. C) Cloud cover. D) Solar radiation only. Show Answer Correct Answer: B) Wind speed and particle size. 20. Which type of weathering can alter a rock through vegetation growth and animal disturbance? A) Mechanical. B) Biological. C) Chemical. D) None of the above. Show Answer Correct Answer: B) Biological. 21. A ..... haze is associated with industrial smog, while a ..... haze is associated with photochemical smog. A) Gray, Yellowish. B) Yellowish, Gray. C) All the above. D) None of the above. Show Answer Correct Answer: A) Gray, Yellowish. 22. *If blue litmus paper stays blue and red litmus paper changes blue, what can you determine A) *pH. B) *it is a base. C) *it is an acid. D) *it is neutral. Show Answer Correct Answer: B) *it is a base. 23. Which compound is mainly responsible for the depletion of ozone layer? A) CH3OH. B) CF2Cl2. C) CO2. D) CH4. Show Answer Correct Answer: B) CF2Cl2. 24. Some pollutants are difficult to break down and therefore accumulate in the environment. These are termed A) Persistent pollutants. B) Chemical indicators. C) Chronic pollutants. D) Non-persistent pollutants. Show Answer Correct Answer: A) Persistent pollutants. 25. Type of reaction that occurs when a strong acid is mixed with a strong base ..... A) Double Replacement. B) Combustion. C) Single replacement. D) Neutralization. Show Answer Correct Answer: D) Neutralization. 26. A displacement reaction will occur when ..... A) A more reactive metal displaces a less reactive metal from its compound. B) A less reactive metal displaces a more reactive metal from its compound. C) Displacement only occurs when two of the same metals are reacted. D) Displacement reactions will only occur in metals above iron in the reactivity series. Show Answer Correct Answer: A) A more reactive metal displaces a less reactive metal from its compound. 27. This is an important inorganic nutrient which helps with our blood. A) Copper. B) Iron. C) Carbon dioxide. D) Calcium. Show Answer Correct Answer: B) Iron. 28. Which of the following best describes biomagnification? A) The movement of water through the environment. B) The conversion of ammonia to nitrate. C) The breakdown of organic matter by bacteria. D) The increase in concentration of a substance in organisms at higher trophic levels. Show Answer Correct Answer: D) The increase in concentration of a substance in organisms at higher trophic levels. 29. What percentage of solar energy does a plant typically use in photosynthesis? A) 25%. B) 10%. C) 50%. D) 2%. Show Answer Correct Answer: B) 10%. 30. Bagaimana karbon dioksida berkontribusi terhadap pemanasan global? A) Karbon dioksida berkontribusi terhadap pemanasan global dengan menjebak panas di atmosfer, meningkatkan efek rumah kaca. B) Karbon dioksida tidak berpengaruh pada suhu global. C) Karbon dioksida mendinginkan atmosfer dengan memantulkan sinar matahari. D) Karbon dioksida adalah sumber utama energi terbarukan. Show Answer Correct Answer: A) Karbon dioksida berkontribusi terhadap pemanasan global dengan menjebak panas di atmosfer, meningkatkan efek rumah kaca. 31. What prevents Rusting A) Keeping it damp. B) Adding salt water. C) Washing with water. D) Painting, Oiling, Galvinising. Show Answer Correct Answer: D) Painting, Oiling, Galvinising. 32. What is the concentration of a solution in parts per million if 0.02 grams of NaCl is dissolved in 1000 grams of water? A) 20 ppm. B) 200 pm. C) 2 ppm. D) 0.2 ppm. Show Answer Correct Answer: A) 20 ppm. 33. Why might the consequences of many chemicals not be immediately realized? A) They are always visible right away. B) They may take time to show their effects. C) They are only harmful to pests. D) They are completely harmless. Show Answer Correct Answer: B) They may take time to show their effects. 34. Pada proses KA-ANDAL, analis kimia berperan penting karena ..... A) Memutuskan layak tidaknya suatu proyek berjalan. B) Merancang rencana sampling parameter seperti pH, BOD, COD secara ilmiah. C) Menentukan sanksi pelanggaran AMDAL. D) Menentukan jenis bahan kimia yang boleh dipakai industri. Show Answer Correct Answer: B) Merancang rencana sampling parameter seperti pH, BOD, COD secara ilmiah. 35. Which of the following is not true about Iodine poisoning? A) It causes brown staining of the angle of jaw. B) It is a weak irritant. C) Causes metabolic acidosis. D) Causes Hypersensitivity reactions. Show Answer Correct Answer: B) It is a weak irritant. 36. Advantage of using CO2 as a solvent for dry cleaning is A) Suspected carcinogen. B) Found in abundance. C) Less harm to groundwater. D) Inexpensive. Show Answer Correct Answer: C) Less harm to groundwater. 37. Which of the following is a source of particulate matter? A) Soil erosion. B) Photosynthesis. C) Water evaporation. D) Volcanic eruptions. Show Answer Correct Answer: D) Volcanic eruptions. 38. Sensitive soils to acid rain are usually: A) Calcareous. B) Rich in lime. C) Granite-based. D) Marine sediments. Show Answer Correct Answer: C) Granite-based. 39. What can acid rain corrode (react and dissolve)? A) Statues. B) Houses. C) Grass. D) Trees. Show Answer Correct Answer: A) Statues. 40. What is the role of free radicals in the atmosphere? A) Increase oxygen levels. B) Neutralize pollutants. C) Decrease ozone layer. D) Enhance UV radiation. Show Answer Correct Answer: C) Decrease ozone layer. 41. Which of the following is not one of the categories for water quality? A) Acidic water. B) Protection of aquatic life. C) Irrigation water. D) Recreational water. Show Answer Correct Answer: A) Acidic water. 42. The major acidic components of acid rain are: A) H2CO3 and HNO3. B) H2SO4 and HNO3. C) H2CO3 and H2SO3. D) H2O and CO2. Show Answer Correct Answer: B) H2SO4 and HNO3. 43. T/F:To calculate ppm (part-per-million) of a substance, you take the mass of the substance and divide it by the mass of the toxin. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 44. Which of the following is a typical dietary source of proteins? A) Rice. B) Meat. C) Vegetable oil. D) None of the above. Show Answer Correct Answer: B) Meat. 45. List the following steps of Water purification in the correct orderStep P:Water is passed through a screen to remove debris.Step Q:Pathogenic organisms are killed by chlorination, UV, or ozone.Step R:Suspended particles clump and settle out.Step S:A flocking agent, such as alum, is added to the water. A) R, P, S, Q. B) P, Q, R, S. C) S, P, R, Q. D) P, S, R, Q. E) S, R, P, Q. Show Answer Correct Answer: D) P, S, R, Q. 46. On the pH scale higher numbers indicate A) Acids. B) Bases. C) All the above. D) None of the above. Show Answer Correct Answer: B) Bases. 47. Jenis deformasi yang dapat kembali ke bentuk semula setelah beban dilepas adalah ..... A) Deformasi elastis. B) Deformasi permanen. C) Deformasi geser. D) Deformasi plastis. Show Answer Correct Answer: A) Deformasi elastis. 48. Which of the following is best for resource conservation? A) Burning materials. B) Burying rubbish. C) Reusing and recycling. D) Overproduction. Show Answer Correct Answer: C) Reusing and recycling. 49. Ingestion refers to: A) The breakdown of compounds due to reaction with water. B) The conversion of atmospheric gases into plant nutrients. C) The passive movement of molecules down a concentration gradient. D) The process by which animals take in food. Show Answer Correct Answer: D) The process by which animals take in food. 50. A pollutant metal with a high density (usually over 4.0g/mL) A) Trace element. B) Heavy metal. C) Mercurial metal. D) Macromineral. Show Answer Correct Answer: B) Heavy metal. 51. Which process causes acid rain? A) Photosynthesis. B) Evaporation. C) Combustion of fossil fuels. D) Nitrogen fixation. Show Answer Correct Answer: C) Combustion of fossil fuels. 52. How can conservation efforts help mitigate the impacts of climate change? A) Conservation efforts help mitigate climate change by preserving carbon-sequestering ecosystems and promoting biodiversity. B) Conservation efforts primarily focus on urban development and infrastructure. C) Conservation efforts have no impact on biodiversity or ecosystems. D) Conservation efforts increase carbon emissions by promoting industrial growth. Show Answer Correct Answer: A) Conservation efforts help mitigate climate change by preserving carbon-sequestering ecosystems and promoting biodiversity. 53. Which of the following is a natural air purification process? A) Mining. B) Industrial emissions. C) Photosynthesis. D) Combustion. Show Answer Correct Answer: C) Photosynthesis. 54. If a mass of 12.0 mg of mercury is dissolved in 100 kg of water, what is the concentration of mercury in ppm? A) 12 ppm. B) 0.12 ppm. C) 1.2 ppm. D) 0.012 ppm. Show Answer Correct Answer: B) 0.12 ppm. 55. One major difference between conventional farming practices and organic farming practices is that organic farmers can use A) Any pesticide they choose. B) Only pesticides derived from natural sources such as microbes, insects, or minerals. C) No pesticides at all. D) Only special synthetic pesticides. Show Answer Correct Answer: B) Only pesticides derived from natural sources such as microbes, insects, or minerals. 56. Emerging contaminants are A) Heavy metals such as lead and cadmium. B) Hydrocarbons. C) Herbicides and Pesticides. D) Caffeine, anti-biotics, disinfectants and other medication. Show Answer Correct Answer: D) Caffeine, anti-biotics, disinfectants and other medication. 57. Which kind of weathering involves the breakdown of rocks through direct contact with atmospheric conditions such as heat, water, ice and pressure? A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical. 58. The items below can be reused, except: A) Plastic and glass containers. B) Old computers and broken mobile phones. C) Old clothes and blankets. D) Aluminum cans and steel parts or items. Show Answer Correct Answer: B) Old computers and broken mobile phones. 59. Th components of filtration are separated based on A) Boiling point. B) Solubility. C) Particle size. D) None of the above. Show Answer Correct Answer: C) Particle size. 60. Which of the following statements is true about how using smaller salt crystals would affect the rate of making a salt solution in water? A) Smaller crystals increase the surface area and slow down dissolving. B) Smaller crystals decrease the surface area and speed up dissolving. C) Smaller crystals increase the surface area and speed up dissolving. D) Smaller crystals decrease the surface area and slow down dissolving. Show Answer Correct Answer: C) Smaller crystals increase the surface area and speed up dissolving. ← 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 3Class 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 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