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 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 9 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What measures can be taken to reduce acid rain? A) Promote the use of plastic products. B) Reduce emissions of SO2 and NOx, promote renewable energy, and enforce stricter regulations. C) Increase use of fossil fuels. D) Ignore industrial emissions. Show Answer Correct Answer: B) Reduce emissions of SO2 and NOx, promote renewable energy, and enforce stricter regulations. 2. Which of these greenhouse gases is a man-made industrial chemical? A) Methane. B) Nitrous oxide. C) Carbon dioxide. D) Chloroflurocarbons. Show Answer Correct Answer: D) Chloroflurocarbons. 3. What two elements do all organic compounds have in common? A) Carbon and oxygen. B) Carbon and hydrogen. C) Carbon and nitrogen. D) Carbon and sulphur. Show Answer Correct Answer: B) Carbon and hydrogen. 4. Which of the following conclusions is supported by the results of the experiment? A) Nitrogen promotes leaf growth, and potassium promotes flower growth. B) Nitrogen promotes leaf growth, and potassium promotes root growth. C) Nitrogen promotes root growth, and phosphorous promotes flower growth. D) Nitrogen promotes root growth, and phosphorous promotes leaf growth. Show Answer Correct Answer: D) Nitrogen promotes root growth, and phosphorous promotes leaf growth. 5. Which atmospheric layer is closest to Earth's surface? A) Stratosphere. B) Troposphere. C) Thermosphere. D) Mesosphere. Show Answer Correct Answer: B) Troposphere. 6. What is the pH of acid rain? A) Above 7. B) Exactly 7. C) Less than 5.6. D) More than 10. Show Answer Correct Answer: C) Less than 5.6. 7. A substance that is neither a acid or a base has a pH of ..... A) 6. B) 8. C) 7. D) 9. Show Answer Correct Answer: C) 7. 8. What strategies can be implemented to protect endangered species? A) Increase hunting quotas for wildlife. B) Promote urban development in natural habitats. C) Implement habitat conservation, legal protection, breeding programs, public education, and ecosystem restoration. D) Limit public access to national parks. Show Answer Correct Answer: C) Implement habitat conservation, legal protection, breeding programs, public education, and ecosystem restoration. 9. Presents of pollution intolerant indicator species will A) Pollute the water. B) Let us know the quality is bad. C) Clean up the water. D) Let us know the quality is good. Show Answer Correct Answer: D) Let us know the quality is good. 10. What are pollutants? A) Gases required for respiration. B) Useful gases in the air. C) Substances harmful to the environment. D) Essential components of the atmosphere. Show Answer Correct Answer: C) Substances harmful to the environment. 11. How does acid rain affect the chemistry of lakes and rivers? A) Acid rain decreases the pH of lakes and rivers, harming aquatic ecosystems and altering chemical balances. B) Acid rain enhances nutrient levels in lakes and rivers, benefiting ecosystems. C) Acid rain has no effect on the chemical composition of water bodies. D) Acid rain increases the pH of lakes and rivers, promoting aquatic life. Show Answer Correct Answer: A) Acid rain decreases the pH of lakes and rivers, harming aquatic ecosystems and altering chemical balances. 12. Which organism is responsible for decaying dead algae in water bodies? A) Fungi. B) Bacteria. C) Fish. D) Insects. Show Answer Correct Answer: B) Bacteria. 13. What is "sour" gas? A) Natural gas that is odorless. B) Natural gas with a high oxygen content. C) Natural gas that is used in fertilizers. D) Natural gas that contains hydrogen sulfide. Show Answer Correct Answer: D) Natural gas that contains hydrogen sulfide. 14. The number of mayflies decreases as the habitat quality of a stream declines.The study of the number of mayflies can be useful to scientists for A) Estimating the concentration of toxins in the tissues of a particular species. B) Chemical monitoring. C) Biological monitoring. D) Estimating the concentration of lipids in the tissues of a particular species. Show Answer Correct Answer: C) Biological monitoring. 15. Which statement best describes diffusion? A) The passive movement of molecules from an area of higher concentration to an area of lower concentration. B) The use of energy by plants to move nutrients into roots against a gradient. C) The chemical breakdown of compounds due to reaction with water. D) The movement of water across a semi-permeable membrane from low to high water concentration. Show Answer Correct Answer: A) The passive movement of molecules from an area of higher concentration to an area of lower concentration. 16. Which process describes the breakdown of chemicals by sunlight? A) Biodegradation. B) Photolysis. C) Phytoremediation. D) Dispersion. Show Answer Correct Answer: B) Photolysis. 17. Minamata disease is caused by A) Arsenic poisoning. B) Mercury poisoning. C) Cadmium poisoning. D) None of the above. Show Answer Correct Answer: B) Mercury poisoning. 18. Identify the CORRECT statements about dissolved oxygen (DO) in water I. At low pressure, the change of DO solubility with temperature decreases II. At higher dissolved salt content, DO becomes more soluble III. At higher temperature, DO becomes more volatile IV. At higher temperature, the change of DO solubility with pressure increases A) I, II. B) II, IV. C) III, IV. D) I, III. Show Answer Correct Answer: D) I, III. 19. Apa pentingnya oksigen terlarut dalam badan air? A) Oksigen terlarut berbahaya bagi populasi ikan. B) Oksigen terlarut penting karena mendukung kehidupan akuatik dan menunjukkan kualitas air. C) Oksigen terlarut hanya mempengaruhi pertumbuhan tanaman di tanah. D) Tingkat oksigen terlarut tidak relevan dengan suhu air. Show Answer Correct Answer: B) Oksigen terlarut penting karena mendukung kehidupan akuatik dan menunjukkan kualitas air. 20. The chemicals that are most likely responsible for increases in algae growth in lakes are A) Oxygen and carbon dioxide. B) Nitrates and carbon dioxide. C) Oxygen and phosphates. D) Nitrates and phosphates. Show Answer Correct Answer: D) Nitrates and phosphates. 21. Some organisms live on unusual substrates. Which example illustrates this adaptation? A) Plants using energy to move nutrients into roots. B) Algae on red snow thriving in extreme conditions. C) Bacteria converting nitrogen gas into nitrates. D) Animals ingesting food through hydrolysis. Show Answer Correct Answer: B) Algae on red snow thriving in extreme conditions. 22. We need to get vitamins from food and/or supplements because: A) Our body cannot produce all vitamins on its own. B) They are not available in any other form. C) They are harmful if not taken from food. D) They are only found in processed foods. Show Answer Correct Answer: A) Our body cannot produce all vitamins on its own. 23. How can the chemistry triangle concept be applied to teach global warming and climate change? A) By exploring sub-microscopic interactions. B) All of the above. C) By focusing on observable impacts at the macro level. D) By using chemical symbols and equations at the symbolic level. Show Answer Correct Answer: B) All of the above. 24. The most important basic species in the atmosphere is A) Calcium carbonate. B) Gas phase carbon monoxide. C) Gas-phase ammonia, NH3. D) Calcium oxide. Show Answer Correct Answer: C) Gas-phase ammonia, NH3. 25. Silent valley is so called because A) Water there flows silently. B) Absence of bees. C) Absence of frogs. D) Absence of noisy cicadas. Show Answer Correct Answer: D) Absence of noisy cicadas. 26. What happens when a lake becomes hypereutrophic? A) Hypolimnion has high dissolved oxygen. B) Heavy metals are released from sediments. C) Water has low phosphorus and chlorophyll. D) Turbidity of water decreases. Show Answer Correct Answer: B) Heavy metals are released from sediments. 27. What are enzymes? A) Large molecules that help enzymes function. B) Special protein molecules that regulate chemical reactions in living organisms. C) Inorganic substances used to create vitamins. D) None of the above. Show Answer Correct Answer: B) Special protein molecules that regulate chemical reactions in living organisms. 28. During mining operations, moist soil compared to dry soil: A) Cannot retain heat. B) Has greater ability to retain heat. C) Has less ability to retain heat. D) Has no difference in heat retention. Show Answer Correct Answer: B) Has greater ability to retain heat. 29. Lethal dose (LD$_{50}$) values are determined by the amount of a substance that: A) Kills a test population when given at least 50g of the substance. B) Kills at least 50% of the test population exposed to the substance. C) Kills at least 50 individuals of the test population exposed to the substance. D) Kills a test population when given at least 50 ml of the substance. Show Answer Correct Answer: B) Kills at least 50% of the test population exposed to the substance. 30. Which statement best defines pollution according to the section? A) Any change in the environment caused by humans. B) Any harmful change to the environment caused naturally or by humans. C) Only human-made chemical spills. D) Natural changes like weathering that affect landscapes. Show Answer Correct Answer: B) Any harmful change to the environment caused naturally or by humans. 31. The pH of severely acidified lakes can fall below: A) 4.0. B) 2.0. C) 3.5. D) 5.0. Show Answer Correct Answer: C) 3.5. 32. Which ion in water helps to make teeth enamel harder? A) Calcium ion. B) Chlorine ion. C) Sulphur ion. D) Fluoride ion. Show Answer Correct Answer: D) Fluoride ion. 33. Which of the following are not what chemicals or nutrient are used for? A) Cell Repair. B) Growth. C) Photosynthesis. D) Energy. Show Answer Correct Answer: C) Photosynthesis. 34. Taj Mahal is being slowly disfigured and discolored. This is primarily due to A) Global warming. B) Soil pollution. C) Water pollution. D) Acid rain. Show Answer Correct Answer: D) Acid rain. 35. Which is not a global threat? A) Health. B) Scarcity of land. C) Human rights. D) Water resources. E) Security. Show Answer Correct Answer: B) Scarcity of land. 36. CFCl2 is responsible for the decomposition of ozone to oxygen. Which of the following reacts with ozone to form oxygen? A) Cl-. B) F-. C) Cl2. D) Cl'. Show Answer Correct Answer: D) Cl'. 37. In general, the organisms that are most useful as indicators of water quality are A) Algae. B) Birds and fish. C) Microinvertebrates. D) Macroinvertebrates. Show Answer Correct Answer: D) Macroinvertebrates. 38. Which of the following is an example of an indicator species? A) Lichen. B) African Elephant. C) Blue Whale. D) Polar Bear. Show Answer Correct Answer: A) Lichen. 39. Organisms who feed directly on producers are called A) Consumers. B) Primary consumers. C) Secondary consumers. D) None. Show Answer Correct Answer: B) Primary consumers. 40. Sardar Sarovar Project is associated with which movement A) Tehri Dam Conflict. B) Save Ganga Project. C) Narmada Bachao Andolan. D) Jungle Bachao Andolan. Show Answer Correct Answer: C) Narmada Bachao Andolan. 41. Acid rain is defined as precipitation with a pH less than: A) 7.0. B) 4.5. C) 5.6. D) 6.0. Show Answer Correct Answer: C) 5.6. 42. What organisms do scientists think evolved first? A) Birds & trees. B) Fish & grass. C) Bacteria & algae. D) Humans & animals. Show Answer Correct Answer: C) Bacteria & algae. 43. A chemical in food, used for energy, growth, body building and cell repair A) Enzyme. B) Nutrient. C) Oxidant. D) Indicator. Show Answer Correct Answer: B) Nutrient. 44. What is the purpose of the base in an antacid? A) To produce more acid. B) To increase stomach acid. C) To neutralize stomach acid. D) To create harmful compounds. Show Answer Correct Answer: C) To neutralize stomach acid. 45. How can you tell that a metal is reacting with water? A) Bright light. B) Fizzing. C) It gets colder. D) Colour change. Show Answer Correct Answer: B) Fizzing. 46. Methane gas is formed by ..... A) Burning of fossil fuel. B) Air pollution. C) Plant and animal matter decompose. D) Burning of plastic. Show Answer Correct Answer: C) Plant and animal matter decompose. 47. What is a long-term benefit of recycling? A) Fewer forests. B) Clean air and water. C) More plastic bags. D) Extra packaging. Show Answer Correct Answer: B) Clean air and water. 48. What is the impact of climate change on weather patterns? A) Climate change only affects ocean temperatures. B) Climate change leads to milder winters and cooler summers. C) Climate change has no effect on weather patterns. D) Climate change causes more extreme weather events, alters precipitation patterns, and increases variability in weather. Show Answer Correct Answer: D) Climate change causes more extreme weather events, alters precipitation patterns, and increases variability in weather. 49. Which of the following compounds is most likely to be part of living organisms? A) MoCl$_{2}$. B) C$_{6}$H$_{12}$O$_{6}$. C) H$_{2}$O. D) BF$_{3}$. Show Answer Correct Answer: B) C$_{6}$H$_{12}$O$_{6}$. 50. What is an example of an aquatic invertebrate? A) Bacteria. B) Caddisfly Larva. C) Plankton. D) Non of the above. Show Answer Correct Answer: B) Caddisfly Larva. 51. Which of the following substances is inorganic? A) Peanut oil. B) Brown sugar. C) Orange juice. D) Table salt. Show Answer Correct Answer: D) Table salt. 52. Pollutant that CAN be broken down A) Edible. B) Biodegradable. C) Non-biodegradable. D) Invisible. Show Answer Correct Answer: B) Biodegradable. 53. What is the relationship between climate change and habitat loss? A) Habitat loss has no impact on climate change. B) Climate change improves habitats for all species. C) Habitat loss is solely caused by urban development. D) Climate change contributes to habitat loss by altering ecosystems and making them unsuitable for various species. Show Answer Correct Answer: D) Climate change contributes to habitat loss by altering ecosystems and making them unsuitable for various species. 54. Which nutrient in fertilizers stimulates early growth and protects against disease? A) Nitrogen. B) Phosphorous. C) Potassium. D) None of the above. Show Answer Correct Answer: C) Potassium. 55. Procedure for testing a hypothesis under controlled conditions A) Experiment. B) Interview. C) Observation. D) Survey. Show Answer Correct Answer: A) Experiment. 56. Which of the following might count as water pollution? A) Water that doesn't have enough nitrate. B) Water that doesn't have enough phosphate. C) Water that is too hot. D) Water that has too much dissolved oxygen. Show Answer Correct Answer: C) Water that is too hot. 57. Which of the following is a method of reducing water pollution? A) Discharging heat-ladened water into natural water systems. B) Increasing use of synthetic fertilizers. C) Using excessive amounts of agricultural chemicals. D) Recycling industrial and agricultural wastes. Show Answer Correct Answer: D) Recycling industrial and agricultural wastes. 58. Mercury is an example of ..... A) Compound. B) Acid. C) Fossil fuel. D) Heavy metal. Show Answer Correct Answer: D) Heavy metal. 59. Which pairing correctly matches nutrient type with amount needed? A) Macronutrients-very small amounts; Micronutrients-large amounts. B) Macronutrients-large amounts for growth and development; Micronutrients-very small amounts but both deficiency and excess can be harmful. C) Macronutrients-do not contain carbon; Micronutrients-contain carbon. D) Macronutrients-only for animals; Micronutrients-only for plants. Show Answer Correct Answer: B) Macronutrients-large amounts for growth and development; Micronutrients-very small amounts but both deficiency and excess can be harmful. 60. Match the term in Column A with the correct description in Column B:Osmosis A) Plants use energy to move nutrients from soil to roots. B) A scale from 0 to 14 that measures acidity or basicity. C) Movement of water through a barrier to balance concentration. D) Chemicals that make the environment dirty or harmful. E) When chemicals build up in higher amounts in animals higher in the food chain. Show Answer Correct Answer: C) Movement of water through a barrier to balance concentration. ← 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