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 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 8 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Why can't plants take nitrogen directly from the atmosphere? A) Nitrogen is only available in solid form in the atmosphere. B) Nitrogen is toxic to plants in its atmospheric form. C) Plants can only absorb oxygen from the atmosphere. D) Plants require nitrogen in a converted form for growth. Show Answer Correct Answer: D) Plants require nitrogen in a converted form for growth. 2. Which of the following is the best method of obtaining pure water from seawater? A) Chlorination. B) Boiling. C) Filtration. D) Distillation. Show Answer Correct Answer: D) Distillation. 3. What happened to the pH of the ocean water as more carbon dioxide was added to the oceans? A) More acidic. B) Increased in pH. C) More basic. D) More neutral. Show Answer Correct Answer: A) More acidic. 4. The most sensitive freshwater organisms to acidification are: A) Crustaceans. B) Fish eggs and larvae. C) Amphibians. D) Algae. Show Answer Correct Answer: B) Fish eggs and larvae. 5. Which of these is NOT a classification of particulate pollutants? A) Mists. B) Smoke. C) Fog. D) Fumes. Show Answer Correct Answer: C) Fog. 6. A healthy water system would have a pH of what? A) 10-12. B) 0-2. C) 6-8. D) 4-7. Show Answer Correct Answer: C) 6-8. 7. What colour flame is observed in the sodium flame test? A) Red. B) Green. C) Yellow. D) Blue. Show Answer Correct Answer: C) Yellow. 8. How did volcanic activity change the Earth's early atmosphere? A) Released large amounts of gases such as carbon dioxide and water vapor. B) Released large amounts of gases such as oxygen. C) Released large amounts of gases such as carbon dioxide, water vapour and oxygen. D) Released very little amounts of carbon dioxide. Show Answer Correct Answer: A) Released large amounts of gases such as carbon dioxide and water vapor. 9. What is used for the purpose of bleaching clothes in the process of laundry? A) CO2. B) CO. C) H2O. D) H2O2. Show Answer Correct Answer: D) H2O2. 10. Which statement about carbon dioxide in the atmosphere is consistent with the section on monitoring the atmosphere? A) It is entirely man-made and absent naturally. B) It is a greenhouse gas naturally present but increased by human activities, contributing to enhanced greenhouse effect and global warming. C) It is a pollutant only at ground level and beneficial at high altitudes. D) It has no role in climate change. Show Answer Correct Answer: B) It is a greenhouse gas naturally present but increased by human activities, contributing to enhanced greenhouse effect and global warming. 11. A gas with high solubility usually has A) High polarity. B) Low reaction with water. C) High vapor pressure. D) Low Henry's constant. Show Answer Correct Answer: A) High polarity. 12. When we discuss greenhouse gases what is the main one we discuss? A) Carbon Dioxide (CO$_{2}$). B) Nitrous oxide (N$_{2}$O). C) Methane (CH$_{4}$). D) Flourinated gases. Show Answer Correct Answer: A) Carbon Dioxide (CO$_{2}$). 13. What cause water pollution? A) People dump things in the countryside. B) Factories produce too much waste water and oil. C) Factories produce good products. D) Factories produce too much smoke. Show Answer Correct Answer: B) Factories produce too much waste water and oil. 14. Cleaning up heavy metals, pesticides, hydrocarbons or solvents by the use of plants ..... A) Photolysis. B) Biomagnification. C) Bioremediation. D) Phytoremediation. Show Answer Correct Answer: D) Phytoremediation. 15. In a chemical reaction, when the sum of enthalpies of reactants is higher than products, the reaction is: A) Neutral. B) Reversible. C) Exothermic. D) Endothermic. Show Answer Correct Answer: C) Exothermic. 16. What should be observed when the oil/sugar mixture is poured into water? A) The mixture evaporates. B) The mixture spreads. C) The mixture solidifies. D) The mixture changes color. Show Answer Correct Answer: B) The mixture spreads. 17. Plants are better at extracting nutrients because: A) They grow in nutrient-rich environments. B) They rely on animals for nutrients. C) They do not need nutrients. D) They have specialized root systems. Show Answer Correct Answer: D) They have specialized root systems. 18. Which chemical indicator is directly related to the ability of aquatic organisms to breathe? A) Dissolved oxygen (DO). B) Osmosis. C) Nitrogen fixation. D) Hydrolysis. Show Answer Correct Answer: A) Dissolved oxygen (DO). 19. Which of the following nutrients are not usually found in fertilizer? A) Nitrogen. B) Oxygen. C) Phosphorus. D) Potassium. Show Answer Correct Answer: B) Oxygen. 20. Why doesn't aluminium corrode when exposed to air? A) Aluminium reacts with oxygen to form an impervious layer of aluminium oxide. B) Aluminium is unreactive to air. C) Aluminium forms a porous layer that allows oxygen to bypass the metal. D) Aluminium is a hard metal and does not corrode easily. Show Answer Correct Answer: A) Aluminium reacts with oxygen to form an impervious layer of aluminium oxide. 21. Which pair correctly matches an essential macronutrient with how plants obtain it, based on the material? A) Nitrogen-absorbed by plant roots as fixed compounds produced by bacteria. B) Carbon-absorbed from soil minerals like quartz. C) Phosphorus-obtained only by animals and not by plants. D) Magnesium-synthesized by plants internally without uptake from the environment. Show Answer Correct Answer: A) Nitrogen-absorbed by plant roots as fixed compounds produced by bacteria. 22. What is the major indoor air pollutant in homes using biomass fuels? A) Nitrogen. B) Ozone. C) Helium. D) Carbon monoxide. Show Answer Correct Answer: D) Carbon monoxide. 23. The process whereby chemicals build up in an organism over time A) Bioaccumulation. B) Biomagnification. C) All the above. D) None of the above. Show Answer Correct Answer: A) Bioaccumulation. 24. Which of the following would increase the rate of biodegradation? A) Increased temperature and moisture. B) Clean the composter with bleach. C) Cooler, drier conditions. D) Line the composter with plastic or clay. Show Answer Correct Answer: A) Increased temperature and moisture. 25. Why is electrolysis expensive? A) It uses a lot of electricity. B) It requires sunlight. C) It needs fuel. D) It pollutes the soil. Show Answer Correct Answer: A) It uses a lot of electricity. 26. Which device helps reduce vehicle emissions? A) Incinerator. B) Oxygen tank. C) Air filter. D) Catalytic converter. Show Answer Correct Answer: D) Catalytic converter. 27. The permissible limit of fluoride ion in drinking water is A) Less than 1 ppm. B) Greater than 1 ppm. C) 1-2 ppm. D) Zero ppm. Show Answer Correct Answer: C) 1-2 ppm. 28. What would be evidence that a lake is being polluted by nearby farms? A) High nitrates. B) Low turbidity. C) Low temperature. D) High DO. Show Answer Correct Answer: A) High nitrates. 29. What is one method to teach about environmental pollution? A) Standardized testing. B) Group discussions. C) Lecturing only. D) Individual assignments. Show Answer Correct Answer: B) Group discussions. 30. What is the role of some chemicals in the environment? A) They are harmful to all living things. B) They are important for maintaining life and can also be harmful to the environment. C) They are only used for industrial purposes. D) They have no impact on living organisms. Show Answer Correct Answer: B) They are important for maintaining life and can also be harmful to the environment. 31. Which of the following metals is extracted using electricity? A) Zinc. B) Sodium. C) Iron. D) Lead. Show Answer Correct Answer: B) Sodium. 32. A chemical used to remove unwanted organisms A) Fertilizer. B) Pollutant. C) Pesticide. D) Herbicide. Show Answer Correct Answer: C) Pesticide. 33. Atmospheric circulation is A) Movement of earth at all levels of the litosphere over all parts of the planet. B) Movement of air at all levels of the atmosphere over all parts of the planet. C) Movement of water at all levels of the hydrosphere over all parts of the planet. D) Movement of fire at all levels of the atmosphere over all parts of the planet. Show Answer Correct Answer: B) Movement of air at all levels of the atmosphere over all parts of the planet. 34. The second step of ozone formation involves monatomic oxygen combining with what molecule? A) CO2. B) NO2. C) O2. D) 2H2O. Show Answer Correct Answer: C) O2. 35. Permanent hardness in water can be removed by: A) Using an ion-exchange resin. B) Boiling. C) Freezing. D) Adding acid. Show Answer Correct Answer: A) Using an ion-exchange resin. 36. Many chemicals in cigarettes are considered carcinogenic because they cause what? A) Heart disease. B) Emphysema. C) Liver Failure. D) Cancer. Show Answer Correct Answer: D) Cancer. 37. Addition of phosphate fertilizers to water bodies causes(a) enhanced growth of algae(b) increase in amount of dissolved oxygen in water(c) deposition of calcium phosphate(d) increase in fish population. A) D. B) B. C) A. D) C. Show Answer Correct Answer: C) A. 38. Smallest particle of a single element A) Molecule. B) Cell. C) Atom. D) Compound. Show Answer Correct Answer: C) Atom. 39. This type of water lathers easily A) Permanent hard. B) Soft. C) Ice. D) Temporary hard. Show Answer Correct Answer: B) Soft. 40. Which of these is NOT a herbicide? A) Sodium chlorate (NaClO3). B) Sodium arsinite (Na3 AsO3). C) Nicotine. D) None of the above. Show Answer Correct Answer: C) Nicotine. 41. The breakdown of compounds by sunlight is called Photolysis. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 42. Which of the following is / are examples of sacrificial protection against rusting?(1) Iron object coated with tin(2) Underground iron pipes connected to magnesium bars(3) Iron railings coated with paint A) Only. B) Only. C) And (3) only. D) And (3) only. Show Answer Correct Answer: A) Only. 43. True/False:Synthetic pesticides can pose a risk to other, desirable species. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 44. This type of diversity refers to a variety of expressed traits or genes within the species. A) Species Diversity. B) Ecosystem Diversity. C) Genetic Diversity. D) None of the above. Show Answer Correct Answer: C) Genetic Diversity. 45. Arrange the order of purification process of water in correct order.I-SedimentationII-ScreeningIII-ChlorinationIV-Filtration V-Storage A) II $\rightarrow$ I $\rightarrow$ IV $\rightarrow$ III $\rightarrow$ V. B) IV $\rightarrow$ II $\rightarrow$ I $\rightarrow$ III $\rightarrow$ V. C) II $\rightarrow$ IV $\rightarrow$ I $\rightarrow$ III $\rightarrow$ V. D) IV $\rightarrow$ I $\rightarrow$ II $\rightarrow$ III $\rightarrow$ V. Show Answer Correct Answer: A) II $\rightarrow$ I $\rightarrow$ IV $\rightarrow$ III $\rightarrow$ V. 46. In the carbon cycle, photosynthesis and cellular respiration maintain balance by: A) Only producing oxygen. B) Only consuming carbon dioxide. C) Converting matter to energy. D) Recycling both oxygen and carbon dioxide. Show Answer Correct Answer: D) Recycling both oxygen and carbon dioxide. 47. How does climate change threaten biodiversity? A) Climate change threatens biodiversity by altering habitats, disrupting ecosystems, and causing species extinction. B) Climate change has no impact on species populations. C) Climate change only affects human health, not ecosystems. D) Climate change improves biodiversity by creating new habitats. Show Answer Correct Answer: A) Climate change threatens biodiversity by altering habitats, disrupting ecosystems, and causing species extinction. 48. Use of chlorofluorocarbons is not encouraged because A) They are harmful to the eyes of people that use it. B) They damage the refrigerators and air conditioners. C) They eat away the ozone in the atmosphere. D) They destroy the oxygen layer. Show Answer Correct Answer: C) They eat away the ozone in the atmosphere. 49. A substance that enriches soil so plants will grow better A) Pesticide. B) Invasive species. C) Fertilizer. D) Herbicide. Show Answer Correct Answer: C) Fertilizer. 50. Forest decline due to acid rain is prominent in: A) Norway and Germany. B) India and China only. C) Australia. D) Egypt. Show Answer Correct Answer: A) Norway and Germany. 51. Organic molecule that is often found in grains, breads and potatoes ..... A) Amino acids. B) Proteins. C) Carbohydrate. D) Lipids. Show Answer Correct Answer: C) Carbohydrate. 52. What is a possible result of global warming? A) Decreased rainfall. B) Rising sea levels. C) Stronger cell walls. D) Thicker ozone layer. Show Answer Correct Answer: B) Rising sea levels. 53. Which gas absorbs most of the ultraviolet radiation in the stratosphere? A) Carbon dioxide. B) Oxygen. C) Nitrogen. D) Ozone. Show Answer Correct Answer: D) Ozone. 54. A chemical used to generally control pests A) Fungicide. B) Pesticide. C) Herbicide. D) Insecticide. Show Answer Correct Answer: B) Pesticide. 55. *Hydrocarbons are made up of A) *hydrogen, oxygen, carbon. B) Carbon dioxide, propane, oxygen. C) *water vapour, nitrogen, sulfur. D) Hydrogen, selenium, phosphorous. Show Answer Correct Answer: A) *hydrogen, oxygen, carbon. 56. How do invasive species affect local biodiversity? A) Invasive species only benefit native species by increasing food sources. B) Invasive species enhance local biodiversity by providing new habitats. C) Invasive species negatively impact local biodiversity by outcompeting native species, introducing diseases, and altering habitats. D) Invasive species have no effect on local biodiversity. Show Answer Correct Answer: C) Invasive species negatively impact local biodiversity by outcompeting native species, introducing diseases, and altering habitats. 57. Caffeine has an LD50 for mice of 130 ppm. Which reason best explains why coffee and caffeinated soft drinks are not considered dangerous? A) You would have to drink enormous amounts of caffeinated drinks to consume a dose of caffeine equivalent to the LD50 for mice. B) Caffeine is popular, so a high toxicity is still an acceptable risk. C) Caffeine breaks down quickly in the body. D) Caffeine is only toxic to mice, not to humans. Show Answer Correct Answer: A) You would have to drink enormous amounts of caffeinated drinks to consume a dose of caffeine equivalent to the LD50 for mice. 58. In an electrolytic cell the electrode at which the electrons enter the solution is called the ..... , the chemical change that occurs at this electrode is called ..... A) Cathode, oxidation. B) Anode, oxidation. C) Cathode, reduction. D) Anode, reduction. Show Answer Correct Answer: C) Cathode, reduction. 59. Which of the following is a major contributor to the formation of acid rain? A) Ozone. B) Sulfur dioxide. C) Carbon monoxide. D) Methane. Show Answer Correct Answer: B) Sulfur dioxide. 60. Bagaimana logam berat dapat mempengaruhi kesehatan manusia? A) Logam berat tidak memiliki dampak pada kesehatan. B) Logam berat adalah nutrisi penting bagi tubuh. C) Logam berat meningkatkan fungsi kekebalan. D) Logam berat dapat menyebabkan gangguan neurologis, kerusakan ginjal, dan meningkatkan risiko kanker. Show Answer Correct Answer: D) Logam berat dapat menyebabkan gangguan neurologis, kerusakan ginjal, dan meningkatkan risiko kanker. ← 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books