This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry – Quiz 26 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 26 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Silent valley is in which district A) Wayanad. B) Malappuram. C) Palakkad. D) Alapuzha. Show Answer Correct Answer: C) Palakkad. 2. The atmosphere is slightly acidic because of A) The presence of a low level of carbon dioxide. B) The existence of high amount of nitrogen. C) The formation of hydrochloric acid by the dissolution of chlorine gas in water. D) The presence of low level of ammonia. Show Answer Correct Answer: A) The presence of a low level of carbon dioxide. 3. Which statement distinguishes organic from inorganic compounds as described? A) Organic compounds contain oxygen; inorganic compounds do not. B) Organic compounds contain carbon and are vital for life; inorganic compounds do not contain carbon. C) Organic compounds are always harmful; inorganic are always safe. D) Organic compounds are only found in plants; inorganic are only found in animals. Show Answer Correct Answer: B) Organic compounds contain carbon and are vital for life; inorganic compounds do not contain carbon. 4. Normal rainwater has a pH around: A) 5.6. B) 7.0. C) 4.0. D) 6.5. Show Answer Correct Answer: A) 5.6. 5. Which gas is NOT responsible for acid rain? A) Nitrogen oxides. B) Sulfur dioxide. C) Carbon dioxide. D) Methane. Show Answer Correct Answer: D) Methane. 6. The reason that Antacids, like tums, work is because they create a neutralization reaction. This is because antacids are A) Indicators. B) Acids. C) Bases. D) Neutralizers. Show Answer Correct Answer: C) Bases. 7. 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) A. B) B. C) C. D) D. Show Answer Correct Answer: A) A. 8. What is an indicator species? A) A species that is the most abundant in an ecosystem. B) A species that provides information about the health of an ecosystem. C) A species that is the largest predator in an ecosystem. D) A species that is used for commercial purposes. Show Answer Correct Answer: B) A species that provides information about the health of an ecosystem. 9. Phytoremediation is best described as: A) Using bacteria to convert toxic waste into nutrients. B) Using plants to clean pollution. C) Spreading pollutants to reduce their strength. D) Measuring how acidic a solution is. Show Answer Correct Answer: B) Using plants to clean pollution. 10. Dose causing death of half of the organisms exposed at this level. A) LD$_{50}$. B) LC$_{50}$. C) TC$_{50}$. D) TD$_{50}$. Show Answer Correct Answer: A) LD$_{50}$. 11. 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%. 12. 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. 13. Among the following compounds, which one is not responsible for the depletion of ozone layer? A) CH4. B) CFCl3. C) NO. D) Cl2. Show Answer Correct Answer: A) CH4. 14. Choose the decomposer. A) Grass. B) Elephant. C) Bacteria. D) Bird. Show Answer Correct Answer: C) Bacteria. 15. What is the function of litmus paper in measuring pH? A) It measures temperature. B) It changes color to indicate pH value. C) It measures weight. D) It produces sound to indicate pH value. Show Answer Correct Answer: B) It changes color to indicate pH value. 16. What is the colour of hydrated cobalt(II) chloride? A) Blue. B) Green. C) Pink. D) Yellow. Show Answer Correct Answer: C) Pink. 17. 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. 18. What are some ways to reduce greenhouse gas emissions? A) Deforestation without reforestation efforts. B) Transitioning to renewable energy sources, improving energy efficiency, promoting sustainable transportation methods, implementing carbon pricing mechanisms, and protecting forests and other natural carbon sinks. C) Increasing fossil fuel consumption. D) Ignoring energy efficiency measures. Show Answer Correct Answer: B) Transitioning to renewable energy sources, improving energy efficiency, promoting sustainable transportation methods, implementing carbon pricing mechanisms, and protecting forests and other natural carbon sinks. 19. Which of the following pollutants is most responsible for the formation of photochemical smog? A) Carbon monoxide ( $CO$. B) Nitrogen oxides ( $NO_x$. C) Sulfur dioxide ( $SO_2$. D) Lead ( $Pb$. Show Answer Correct Answer: B) Nitrogen oxides ( $NO_x$. 20. Which of the following is a non-point source of pollution? A) A factory dumping chemicals into a river. B) A discharge coming from a fixed pipe. C) A waste water plant. D) Stormwater drains along a road. Show Answer Correct Answer: D) Stormwater drains along a road. 21. Which gas emission from cars causes the formation of acid rain and smog? A) Carbon dioxide. B) Nitrogen oxide. C) Oxygen. D) Ozone. Show Answer Correct Answer: B) Nitrogen oxide. 22. 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. 23. The process by which water, ice, wind or gravity moves weathered rock and soil from one place to another. A) Weathering. B) Erosion. C) Deposition. D) Dumptruck. Show Answer Correct Answer: B) Erosion. 24. Which of the following describes a base? A) A compound that dissolves in water to form a solution with a pH lower than 7. B) A compound that dissolves in water to form a solution with a pH higher than 7. C) A compound that neither dissolves in water nor affects pH. D) A compound that has a pH of exactly 7. Show Answer Correct Answer: B) A compound that dissolves in water to form a solution with a pH higher than 7. 25. 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. ← PreviousNext →Related 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 8Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 9Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books