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 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 11 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The reason that Antacids, like tums, work is because they create a neutralization reaction. This is because antacids are A) Neutralizers. B) Acids. C) Bases. D) Indicators. Show Answer Correct Answer: C) Bases. 2. Water samples with BOD values of 4 ppm and 18 ppm, respectively, are(a) clean and highly polluted(b) highly polluted and highly polluted(c) highly polluted and clean(d) clean and clean. A) D. B) C. C) A. D) B. Show Answer Correct Answer: C) A. 3. What is an indicator species? A) A species that is the largest predator in an ecosystem. B) A species that is the most abundant in an ecosystem. C) A species that is used for commercial purposes. D) A species that provides information about the health of an ecosystem. Show Answer Correct Answer: D) A species that provides information about the health of an ecosystem. 4. Phytoremediation is best described as: A) Spreading pollutants to reduce their strength. B) Measuring how acidic a solution is. C) Using bacteria to convert toxic waste into nutrients. D) Using plants to clean pollution. Show Answer Correct Answer: D) Using plants to clean pollution. 5. Dose causing death of half of the organisms exposed at this level. A) LD$_{50}$. B) TD$_{50}$. C) TC$_{50}$. D) LC$_{50}$. Show Answer Correct Answer: A) LD$_{50}$. 6. How much of the Earth's atmosphere is carbon dioxide? A) Less than 1%. B) 6 %. C) More than 80%. D) None of the above. Show Answer Correct Answer: A) Less than 1%. 7. Which of these processes absorbs carbon dioxide from the atmosphere? A) Respiration. B) Combustion of fossil fuels. C) Photosynthesis. D) None of the above. Show Answer Correct Answer: C) Photosynthesis. 8. Among the following compounds, which one is not responsible for the depletion of ozone layer? A) CFCl3. B) NO. C) CH4. D) Cl2. Show Answer Correct Answer: C) CH4. 9. Choose the decomposer. A) Elephant. B) Grass. C) Bacteria. D) Bird. Show Answer Correct Answer: C) Bacteria. 10. What is the function of litmus paper in measuring pH? A) It measures weight. B) It produces sound to indicate pH value. C) It measures temperature. D) It changes color to indicate pH value. Show Answer Correct Answer: D) It changes color to indicate pH value. 11. What is the colour of hydrated cobalt(II) chloride? A) Blue. B) Green. C) Yellow. D) Pink. Show Answer Correct Answer: D) Pink. 12. Biological indicators are harmful to the environment. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 13. Which of the following pollutants is most responsible for the formation of photochemical smog? A) Sulfur dioxide ( $SO_2$. B) Lead ( $Pb$. C) Carbon monoxide ( $CO$. D) Nitrogen oxides ( $NO_x$. Show Answer Correct Answer: D) Nitrogen oxides ( $NO_x$. 14. Which gas emission from cars causes the formation of acid rain and smog? A) Nitrogen oxide. B) Carbon dioxide. C) Ozone. D) Oxygen. Show Answer Correct Answer: A) Nitrogen oxide. 15. What is the key point emphasized when teaching about the manufacturing of valuable products? A) Glycerine is a valuable byproduct of soap production. B) Food scraps and yard waste can be converted into compost. C) Natural compost is formed through the decomposition of organic matter. D) Nitrogenous fertilizers encourage plant growth and development. Show Answer Correct Answer: D) Nitrogenous fertilizers encourage plant growth and development. 16. Which of the following describes a base? A) A compound that dissolves in water to form a solution with a pH higher than 7. B) A compound that has a pH of exactly 7. C) A compound that neither dissolves in water nor affects pH. D) A compound that dissolves in water to form a solution with a pH lower than 7. Show Answer Correct Answer: A) A compound that dissolves in water to form a solution with a pH higher than 7. 17. What are the two main byproducts of fossil fuel combustion? A) Carbon dioxide and water vapour. B) Oxygen and nitrogen. C) Methane and helium. D) Sulfur dioxide and hydrogen. Show Answer Correct Answer: A) Carbon dioxide and water vapour. 18. Which statement defines an organic compound? A) A chemical compound that does not contain carbon, such as minerals and salts. B) A chemical compound containing carbon, such as carbohydrates, proteins, lipids, and nucleic acids. C) A compound that dissolves in water to form acidic solutions. D) A molecule that always tastes sour and is corrosive. Show Answer Correct Answer: B) A chemical compound containing carbon, such as carbohydrates, proteins, lipids, and nucleic acids. 19. Colorimetry works on the principle that: A) The darker the colour, the higher the concentration. B) Colourless solutions are more concentrated. C) Light passes equally through all solutions. D) Colour doesn't affect light absorption. Show Answer Correct Answer: A) The darker the colour, the higher the concentration. 20. Dissolved Oxygen (DO) in water refers to which of the following? A) Oxygen bubbles visible in turbulent water. B) The amount of oxygen dissolved in water, essential for aquatic life survival. C) The oxygen produced by plants during photosynthesis only. D) The oxygen concentration in the atmosphere above a lake. Show Answer Correct Answer: B) The amount of oxygen dissolved in water, essential for aquatic life survival. 21. Acid rain is an example of: A) Transboundary pollution. B) Local pollution only. C) Natural emission. D) Indoor pollution. Show Answer Correct Answer: A) Transboundary pollution. 22. What are some examples of ecosystems that are particularly vulnerable to climate change? A) Temperate forests. B) Grasslands. C) Deserts. D) Coral reefs, Arctic tundra, mangroves. Show Answer Correct Answer: D) Coral reefs, Arctic tundra, mangroves. 23. Where are fossil fuels commonly burnt? A) In homes, vehicles, and industrial plants. B) In forests and oceans. C) In schools and hospitals. D) In parks and gardens. Show Answer Correct Answer: A) In homes, vehicles, and industrial plants. 24. We can reduce our need for fossil fuels by developing A) New oil sources. B) Gasoline powered cars. C) Alternative energy sources. D) Natural gas lines. Show Answer Correct Answer: C) Alternative energy sources. 25. Photochemical smog occurs in warm, dry and sunny climate. One of the following is not amongst the components of photochemical smog, identify it. A) NO$_{2}$. B) O$_{3}$. C) SO$_{2}$. D) Unsaturated hydrocarbon. Show Answer Correct Answer: C) SO$_{2}$. 26. Which organic compound is most involved in cell division? A) Lipds. B) Proteins. C) Nucleic acids. D) Carbohydrates. Show Answer Correct Answer: C) Nucleic acids. 27. What are the environmental impacts of pesticide use on biodiversity? A) Pesticides only affect agricultural pests without impacting other species. B) Pesticides have no effect on ecosystems and maintain genetic diversity. C) Pesticides negatively impact biodiversity by harming non-target species, disrupting ecosystems, and reducing genetic diversity. D) Pesticides enhance biodiversity by promoting species growth and resilience. Show Answer Correct Answer: C) Pesticides negatively impact biodiversity by harming non-target species, disrupting ecosystems, and reducing genetic diversity. 28. What are the objectives of the session on acid-base indicators? A) To plan methods of teaching environmental pollution. B) To define acid-base indicators and prepare natural indicators from plants. C) To list some manufacturing industries in Ethiopia. D) To comprehend the components that make the environment. Show Answer Correct Answer: B) To define acid-base indicators and prepare natural indicators from plants. 29. What is the concentration, in ppm, of lead in a 6 kg (6 000 000 mg) solution that contains 12 mg of lead? A) 2.0 ppm. B) 3.0 ppm. C) 1.0 ppm. D) 4.0 ppm. Show Answer Correct Answer: A) 2.0 ppm. 30. Explain the role of particulate matter in air quality. A) Particulate matter is solely beneficial for environmental growth. B) Particulate matter significantly impacts air quality by affecting human health and environmental conditions. C) Particulate matter has no effect on air quality or health. D) Particulate matter improves air quality by filtering pollutants. Show Answer Correct Answer: B) Particulate matter significantly impacts air quality by affecting human health and environmental conditions. 31. Yellow phosphorous is A) Neurotoxic. B) Hepatotoxic. C) Nephrotoxic. D) All of the above. Show Answer Correct Answer: D) All of the above. 32. Which of the following statements best explains the high levels of pesticide in the whooping crane? A) The whooping crane's skin absorbed the pesticide. B) The whooping crane fed on pesticide-treated grass near the lake. C) The whooping crane swam in contaminated lake water. D) The whooping crane's primary food source was the fish from the lake. Show Answer Correct Answer: D) The whooping crane's primary food source was the fish from the lake. 33. Which equation represents the formation of sulfuric acid in acid rain? A) SO3 + H2O $\rightarrow$ H2SO4. B) O2 + N2 $\rightarrow$ NO2. C) NO2 + H2O $\rightarrow$ HNO3. D) CO2 + H2O $\rightarrow$ H2CO3. Show Answer Correct Answer: A) SO3 + H2O $\rightarrow$ H2SO4. 34. People can reduce waste by using products that are A) Biodegradable. B) Invasive. C) Nonrenewable. D) Fossil fuels. Show Answer Correct Answer: A) Biodegradable. 35. The term B.O.D. stands for: A) Biological Oxidation Depth. B) Biochemical Oxygen Demand. C) Basic Oxygen Determination. D) Base Oxygen Degree. Show Answer Correct Answer: B) Biochemical Oxygen Demand. 36. Colourless, odourless gas that can cause headaches, sleepiness and even death when inhaled by humans ..... A) Nitrogen oxides. B) Carbon dioxide. C) Sulfur dioxide. D) Carbon monoxide. Show Answer Correct Answer: D) Carbon monoxide. 37. Macronutrients are: A) Elements and compounds needed by plants and animals in relatively large amounts for growth and development (e.g., nitrogen, phosphorus, potassium). B) Elements needed in very small amounts; both deficiency and excess can be harmful (e.g., selenium). C) Compounds that dissolve in water with pH less than 7. D) Gases fixed by bacteria into usable forms for plants. Show Answer Correct Answer: A) Elements and compounds needed by plants and animals in relatively large amounts for growth and development (e.g., nitrogen, phosphorus, potassium). 38. What is the primary source of energy in most ecosystems? A) Kinetic energy. B) Thermal energy. C) Chemical energy. D) Solar energy. Show Answer Correct Answer: D) Solar energy. 39. Which energy source produces the least greenhouse gases? A) Petroleum. B) Diesel. C) Coal. D) Solar energy. Show Answer Correct Answer: D) Solar energy. 40. In water quality assessment, biological indicators are useful because A) They measure pH and nitrogen directly. B) Different species thrive in different conditions, revealing ecosystem health. C) They eliminate the need for chemical testing. D) They indicate only temperature changes. Show Answer Correct Answer: B) Different species thrive in different conditions, revealing ecosystem health. 41. *The level between the top soil and groundwater is called: A) *water table. B) *permeable soil. C) *middle soil. D) *ground soil. Show Answer Correct Answer: A) *water table. 42. What is ammonia converted into during the nitrogen cycle? A) Hydrogen. B) Carbon dioxide. C) Nitrates. D) Oxygen. Show Answer Correct Answer: C) Nitrates. 43. What is the purpose of incinerators in waste management? A) To recycle waste. B) To incinerate toxic waste. C) To store waste in landfills. D) To convert waste into compost. Show Answer Correct Answer: B) To incinerate toxic waste. 44. What are the disadvantage of using tetra chloride as a solvent for dry cleaning? A) Contaminates groundwater. B) Suspected carcinogen. C) Both A and B. D) None of the above. Show Answer Correct Answer: C) Both A and B. 45. What is a misconception about green chemistry and cleaner production? A) Green chemistry is not related to sustainability. B) Individual actions don't matter in addressing environmental issues. C) Cleaner production has no impact on reducing pollution. D) Technology alone can solve all environmental problems. Show Answer Correct Answer: D) Technology alone can solve all environmental problems. 46. A chemical is found given to 300 rats and is found to have killed 150 of them. This is an example of ..... A) Chronic Toxicity. B) LD50. C) PPM. D) Acute Toxicity. Show Answer Correct Answer: B) LD50. 47. Which statement about sulfur dioxide is accurate based on air quality monitoring? A) It reduces smog by neutralizing nitrogen oxides. B) It contributes to smog and acid rain and often comes from fossil fuel combustion. C) It is harmless to crops and human health. D) It primarily originates from photosynthesis in plants. Show Answer Correct Answer: B) It contributes to smog and acid rain and often comes from fossil fuel combustion. 48. Harmful ultraviolet radiation from the Sun is absorbed by A) Soil. B) Clouds. C) Water. D) Ozone molecules. Show Answer Correct Answer: D) Ozone molecules. 49. What element rusts? A) Potassium. B) Manganese. C) Iron. D) Carbon. Show Answer Correct Answer: C) Iron. 50. Define pollutants and give two examples. A) Sugar and salt. B) Two examples of pollutants are carbon monoxide and plastic waste. C) Water and sunlight. D) Oxygen and nitrogen. Show Answer Correct Answer: B) Two examples of pollutants are carbon monoxide and plastic waste. 51. An area of porous rock below ground level which can hold useful amounts of water is called A) A ground water well. B) A recharge zone. C) An injection well. D) An aquifer. Show Answer Correct Answer: D) An aquifer. 52. Water that soaks through the soil and carries dissolved substances into the soil is called ..... A) Acid rain. B) Contaminant. C) Leachate. D) Filtrate. Show Answer Correct Answer: C) Leachate. 53. *A substance with a pH of 9 is considered A) *weak acid. B) *weak base. C) Neutral. D) *strong base. E) *strong acid. Show Answer Correct Answer: B) *weak base. 54. Recycling paper reduces: A) Ozone. B) Trees cut down. C) Car use. D) Plastic production. Show Answer Correct Answer: B) Trees cut down. 55. Chemical responsible for ozone depletion is A) Peroxyacetyl nitrate (PAN). B) Chlorofluorocarbons (CFCs). C) CO$_{2}$. D) NO$_{2}$. Show Answer Correct Answer: B) Chlorofluorocarbons (CFCs). 56. The process of changing free nitrogen into a form that organisms can use them. A) Nitrogen fixation. B) Nitrification. C) Climate change. D) Nitrogen formation. Show Answer Correct Answer: A) Nitrogen fixation. 57. What is the efficiency rate of energy transfer between trophic levels in an ecosystem? A) 5%. B) 10%. C) 1%. D) 15%. Show Answer Correct Answer: B) 10%. 58. What is formed when sodium reacts with water? A) Sodium oxide and hydrogen. B) Sodium hydroxide and hydrogen. C) Sodium hydroxide and oxygen. D) Sodium hydroxide and carbon dioxide. Show Answer Correct Answer: B) Sodium hydroxide and hydrogen. 59. Caffine has an LD50 of 130ppm for mice. Which is the best reason that coffee and caffinated soft drinks are not considered dangerous? A) Caffine is only toxic to mice and not to humans. B) You would have to drink an enormous amounts of caffinated drinks to consume a dose that would amount to that concentration. C) LD50 is a rating only used for mice. D) Caffine is popular, so a high toxicity is acceptable. Show Answer Correct Answer: B) You would have to drink an enormous amounts of caffinated drinks to consume a dose that would amount to that concentration. 60. One effect of rising global temperatures is: A) Stronger gravity. B) Lower sea levels. C) Coral bleaching. D) More volcanic eruptions. Show Answer Correct Answer: C) Coral bleaching. ← 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