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 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 14 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A compound that dissolves in water to form a solution with a pH lower than 7 ..... A) Base. B) Neutral. C) Sour. D) Acid. Show Answer Correct Answer: D) Acid. 2. A substance that speeds up a chemical reaction by lowering activation energy ..... A) Catalyst. B) Reactant. C) Product. D) Inhibitor. Show Answer Correct Answer: A) Catalyst. 3. What is the main goal of cleaner production? A) To reduce product quality. B) To increase waste. C) To enhance pollution. D) To optimize resource efficiency. Show Answer Correct Answer: D) To optimize resource efficiency. 4. *A chemical with a LD50 of 2700mg/kg means A) *50 animals are killed by that dose. B) *animals are killed by 50% of that chemical dose. C) *the animals live for 50% of their lifetime with that does. D) *the chemical kills 50% of the animals with that dose. Show Answer Correct Answer: D) *the chemical kills 50% of the animals with that dose. 5. Scrubbers are devices installed in smokestacks to A) Reduce the amount of materials such as SO$_{2}$ in the smoke they discharge. B) Clean out the boilers for more efficient operation. C) Clean out the stack so smoke can move rapidly upwards. D) Reduce the amount of sulphur in coal before it is burned. Show Answer Correct Answer: A) Reduce the amount of materials such as SO$_{2}$ in the smoke they discharge. 6. What is the definition of a renewable resource? A) Things that don't run out. B) Things that do run out. C) Stuff that makes things happen. D) None of the above. Show Answer Correct Answer: A) Things that don't run out. 7. What do decomposers break down? A) Minerals. B) Living organisms. C) Sunlight. D) Fossil fuels. Show Answer Correct Answer: B) Living organisms. 8. Which of the following are not standard procedures to store hazardous chemicals at home? A) Keep oxidizers away from flammable. B) Discard old hazardous products. C) Keep out of reach of children. D) Store in a warm, moist place. Show Answer Correct Answer: D) Store in a warm, moist place. 9. Six elements make up 99% of the human body. Which grouping below does NOT contain any of those elements? A) Calcium, Magnesium. B) Lithium, Iodine. C) Sulfur, Potassium. D) Nitrogen, Phosphorus. Show Answer Correct Answer: B) Lithium, Iodine. 10. Nitrogen fixation refers to: A) The conversion of nitrates into nitrogen gas by fungi. B) The process by which certain bacteria convert atmospheric nitrogen gas into compounds usable by plants. C) The addition of nitrogen to water to increase pH. D) The absorption of nitrogen by animal digestive systems. Show Answer Correct Answer: B) The process by which certain bacteria convert atmospheric nitrogen gas into compounds usable by plants. 11. Which of the following would lead to an increase in dissolved oxygen in a body of water? A) Thermal pollution. B) Warmer temperatures. C) Hypoxia. D) Photosynthesis. E) Cellular respiration. Show Answer Correct Answer: D) Photosynthesis. 12. An environmental problem which atmospheric chemistry does not addressed is A) Global warming. B) Acid rain. C) Acid mine water. D) Photochemical smog. Show Answer Correct Answer: C) Acid mine water. 13. What is the pH value of a neutral substance? A) 0. B) 4. C) 7. D) 14. Show Answer Correct Answer: C) 7. 14. Water beads up on the surface of a penny because of what property? A) Changes in Density. B) Adhesion. C) High Surface Tension. D) Universal Solvent. Show Answer Correct Answer: C) High Surface Tension. 15. Algae blooms will ..... the amount of dissolved oxygen in an aquatic system. A) Decrease. B) Increase. C) All the above. D) None of the above. Show Answer Correct Answer: A) Decrease. 16. What absorbs ultraviolet rays in the atmosphere? A) Greenhouse gases. B) Troposphere. C) Ozone layer. D) Stratosphere. Show Answer Correct Answer: C) Ozone layer. 17. What is the main cause of ocean acidification? A) Plastic pollution. B) Increased $CO_2$. C) Oil spills. D) Agricultural runoff. Show Answer Correct Answer: B) Increased $CO_2$. 18. Explain the role of carbon dioxide in the greenhouse effect. A) Carbon dioxide reduces the Earth's temperature. B) Carbon dioxide acts as a greenhouse gas by trapping heat in the Earth's atmosphere. C) Carbon dioxide has no impact on the greenhouse effect. D) Carbon dioxide absorbs ultraviolet radiation. Show Answer Correct Answer: B) Carbon dioxide acts as a greenhouse gas by trapping heat in the Earth's atmosphere. 19. What is a common cause of land pollution related to agriculture? A) Urbanization. B) Mining. C) Excessive use of synthetic fertilizers. D) Deforestation. Show Answer Correct Answer: C) Excessive use of synthetic fertilizers. 20. Acid rain increases leaching of which nutrient from soil? A) Nitrate. B) Potassium. C) Calcium. D) All of these. Show Answer Correct Answer: D) All of these. 21. When the alkali metals react with water, which reacts most vigorously? A) Francium. B) Sodium. C) Potassium. D) Rubidium. Show Answer Correct Answer: A) Francium. 22. ..... is released when alkali metal react with water A) Carbon di oxide. B) Hydrogen. C) Oxygen. D) Metahne. Show Answer Correct Answer: B) Hydrogen. 23. Carbon moves through the food chain mainly by: A) Combustion. B) Feeding. C) Photosynthesis. D) Evaporation. Show Answer Correct Answer: B) Feeding. 24. What is the general term for substances used to protect crops from pests? A) Fungicides. B) Herbicides. C) Pesticides. D) Fertilizers. Show Answer Correct Answer: C) Pesticides. 25. What is the role of visual aids in teaching environmental chemistry? A) To confuse students. B) To illustrate concepts. C) To limit understanding. D) To replace textbooks. Show Answer Correct Answer: B) To illustrate concepts. 26. Which metal is too reactive to be extracted using carbon? A) Aluminium. B) Zinc. C) Lead. D) Copper. Show Answer Correct Answer: B) Zinc. 27. Patty believes that any biodegradable product is better than a non-biodegradable product. What is she not considering? A) The time the product may take to degrade. B) The conditions needed to degrade the product. C) The by-products that result when the product degrades. D) All of the above. Show Answer Correct Answer: D) All of the above. 28. How do greenhouse gas emissions affect global temperatures? A) Greenhouse gas emissions cool the planet by reflecting sunlight. B) Greenhouse gas emissions decrease global temperatures by absorbing heat. C) Greenhouse gas emissions increase global temperatures by trapping heat in the atmosphere. D) Greenhouse gas emissions have no impact on global temperatures. Show Answer Correct Answer: C) Greenhouse gas emissions increase global temperatures by trapping heat in the atmosphere. 29. *Which of the following is NOT an example of a heavy metal? A) Zinc. B) Cadmium. C) Lithium. D) Lead. Show Answer Correct Answer: C) Lithium. 30. The main elements in CFCs are A) Chlorine, Fluorine, Calcium. B) Carbon, Chlorine, Fluorine. C) Chromium, Chlorine, Fluorine. D) Carbon, Calcium, Francium. Show Answer Correct Answer: B) Carbon, Chlorine, Fluorine. 31. Reactions in galvanic cells are A) Non-spontaneous, redox reactions. B) Non-spontaneous, non-redox reactions. C) Spontaneous, non-redox reactions. D) Spontaneous, redox reactions. Show Answer Correct Answer: D) Spontaneous, redox reactions. 32. What is the condition required for initiation of photochemical smog? A) Removal of ozone. B) Null cycle. C) Photolysis of water. D) Quenching of OH radicals. Show Answer Correct Answer: B) Null cycle. 33. Many plants cannot grow in sandy soil. Why is this true? A) Sandy soil does not hold enough water. B) Air cannot pass through sandy soil. C) Roots cannot easily push through sandy soil. D) Sandy soil has too many nutrients. Show Answer Correct Answer: A) Sandy soil does not hold enough water. 34. Smoky stool syndrome is associated with toxicity of A) Chlorine. B) Carbon monoxide. C) Iodine. D) Phosphorous. Show Answer Correct Answer: D) Phosphorous. 35. Analysis of chemical impact examples in AMDAL of fertilizer factories to predict the most likely environmental risk. A) River eutrophication due to excess nitrogen and phosphorus from waste. B) Increase in soil pH due to acid sulfate from mining tailings. C) Benzene pollution causing carcinogenic effects in the air. D) Mercury bioaccumulation only in terrestrial ecosystems. Show Answer Correct Answer: A) River eutrophication due to excess nitrogen and phosphorus from waste. 36. What issues are not caused by greenhouse gases? (2) A) Depletion of the ozone. B) Melting ice caps. C) Acid rain. D) Flooding. E) Warmer air temperatures. Show Answer Correct Answer: C) Acid rain. 37. Which of the following is a natural source of pollution? A) Volcanic eruptions. B) Industrial waste. C) Automobile emissions. D) Chemical fertilizers. Show Answer Correct Answer: A) Volcanic eruptions. 38. The buffering capacity of water bodies depends on: A) Temperature. B) Organic matter. C) Calcium carbonate content. D) Depth. Show Answer Correct Answer: C) Calcium carbonate content. 39. The effects of industrial activity and the burning of fossil fuels on the environment include: A) Increased greenhouse gases and global warming. B) Decreased air pollution and cooling. C) Improved biodiversity and ecosystem health. D) Reduced carbon footprint and sustainability. Show Answer Correct Answer: A) Increased greenhouse gases and global warming. 40. Heavy metals leached by acid rain enter the food chain causing: A) Metal poisoning. B) Improved nutrition. C) Radiation sickness. D) Genetic mutations. Show Answer Correct Answer: A) Metal poisoning. 41. Which of the following is a major source of sulfur dioxide ( $SO_2$ A) Automobile exhaust. B) Burning coal. C) Fertilizer runoff. D) Volcanic eruptions. Show Answer Correct Answer: B) Burning coal. 42. Which metal is most susceptible to acid corrosion? A) Copper. B) Lead. C) Iron. D) All of these. Show Answer Correct Answer: D) All of these. 43. Which component of smog causes eye irritation? A) Methane. B) Ozone. C) Carbon dioxide. D) Water vapor. Show Answer Correct Answer: B) Ozone. 44. The upper stratosphere consisting of the ozone layer protects us from the sun's radiation that falls in the wavelength region of(a) 400-550 nm(b) 600-750 nm(c) 200-315 nm(d) 0.8-1.5 nm A) D. B) C. C) A. D) B. Show Answer Correct Answer: B) C. 45. What are the causes of water hardness? A) Low pH levels. B) Dissolved liquids. C) Rocks. D) High ammonia levels. Show Answer Correct Answer: C) Rocks. 46. Which term best describes the condition of water based on chemical, physical, and biological characteristics important for supporting life and human use? A) Biological Indicators. B) Air Quality. C) Monitoring. D) Water Quality. Show Answer Correct Answer: D) Water Quality. 47. Which of the following gases is considered a major greenhouse gas? A) Oxygen. B) Argon. C) Nitrogen. D) Carbon dioxide. Show Answer Correct Answer: D) Carbon dioxide. 48. Hydrolysis is defined as: A) The chemical breakdown of a compound due to reaction with water, such as the digestion of starch into glucose. B) The measurement of acidity or basicity from 0 to 14. C) The passive diffusion of water across membranes. D) The process by which animals take in food. Show Answer Correct Answer: A) The chemical breakdown of a compound due to reaction with water, such as the digestion of starch into glucose. 49. Acid rain has a pH LESS than A) 6. B) 8. C) 3. D) 7. Show Answer Correct Answer: A) 6. 50. Which of the following has the highest concentration of theobromine? A) Unsweetened cocoa powder. B) Semi-sweet chocolate. C) White chocolate. D) Milk chocolate. Show Answer Correct Answer: A) Unsweetened cocoa powder. 51. What is the primary reason for the increase in greenhouse gas emissions? A) Increased use of renewable energy. B) Deforestation and burning of fossil fuels. C) Expansion of natural habitats. D) Decrease in industrial activities. Show Answer Correct Answer: B) Deforestation and burning of fossil fuels. 52. A substance that speeds up a chemical reaction without being used up in the reaction A) Catalyst. B) Reactant. C) Converter. D) Inhibitor. Show Answer Correct Answer: A) Catalyst. 53. What are the objectives of the session on natural resource and industry? A) To propose methods of teaching manufacturing valuable products in industry. B) To identify different types of natural resources. C) To explain the methods and chemical processes involved in manufacturing fertilizers. D) To comprehend how to teach various industrial chemistry concepts. Show Answer Correct Answer: A) To propose methods of teaching manufacturing valuable products in industry. 54. *Active transport is: A) *movement from high concentration to low concentration requiring energy. B) *movement from low concentration to high concentration requiring energy. C) Movement from low concentration to high concentration. D) Movement from high concentration to low concentration. Show Answer Correct Answer: B) *movement from low concentration to high concentration requiring energy. 55. What is the purpose of processing natural gas? A) To convert it into a solid form. B) To separate its components for different uses. C) To increase its volume. D) To make it flammable. Show Answer Correct Answer: B) To separate its components for different uses. 56. The units that concentration of chemicals in the environment is often measured in ..... A) Grams per Litre. B) Parts per whole. C) Percentage. D) Parts per Million. Show Answer Correct Answer: D) Parts per Million. 57. Which greenhouse gas is primarily produced by livestock? A) Oxygen. B) Methane. C) Nitrogen. D) Carbon dioxide. Show Answer Correct Answer: B) Methane. 58. What is one method to control air pollution? A) Using tall chimneys. B) Encouraging deforestation. C) Reducing vegetation in industrial areas. D) Using more fossil fuels. Show Answer Correct Answer: A) Using tall chimneys. 59. Which statement defines Biological Indicators in the context of water ecosystems? A) Measurements of dissolved oxygen, pH, and phosphorus. B) Organisms such as aquatic invertebrates and microorganisms used to assess ecosystem health. C) The amount of oxygen dissolved in water essential for survival. D) Guidelines for acceptable water for irrigation only. Show Answer Correct Answer: B) Organisms such as aquatic invertebrates and microorganisms used to assess ecosystem health. 60. What is the function of adding concentrated sulphuric acid in the Winkler method procedure? A) To neutralize the solution. B) To increase the pH. C) To remove excess water. D) To dissolve the precipitate. Show Answer Correct Answer: D) To dissolve the precipitate. ← 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 6Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 7Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books