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 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Decayed organic material in soil is called ..... A) Clay. B) Humus. C) Silt. D) Litter. Show Answer Correct Answer: B) Humus. 2. Which process explains how molecules spread out from an area where there are many to an area where there are fewer? A) Osmosis. B) Diffusion. C) Biodegradation. D) Active transport. Show Answer Correct Answer: B) Diffusion. 3. Name the most common greenhouse gas emitted by human activities. A) Sulfur hexafluoride (SF6). B) Nitrous oxide (N2O). C) Carbon dioxide (CO2). D) Methane (CH4). Show Answer Correct Answer: C) Carbon dioxide (CO2). 4. Plants absorb nutrients through which processes mentioned in the material? A) Filtration and evaporation. B) Diffusion, osmosis, and active transport. C) Photosynthesis and respiration. D) Condensation and sublimation. Show Answer Correct Answer: B) Diffusion, osmosis, and active transport. 5. Which of the following statements describes one characteristic shared by ALL biodegradable substances? A) They decompose faster at low temperatures. B) They can be broken down by inorganic compounds. C) They decompose faster in dry conditions. D) They can be broken down by simple organisms. Show Answer Correct Answer: D) They can be broken down by simple organisms. 6. What parameters are commonly assessed in water quality testing? A) Salinity, alkalinity, color, temperature. B) PH, dissolved oxygen, turbidity, total dissolved solids, nutrients, heavy metals, microbial contaminants. C) Suspended solids, conductivity, hardness, odor. D) Chlorine, fluoride, ammonia, viscosity. Show Answer Correct Answer: B) PH, dissolved oxygen, turbidity, total dissolved solids, nutrients, heavy metals, microbial contaminants. 7. The internal energy of a system (U) is the sum of: A) Only kinetic energy of molecules. B) Only potential energy between molecules. C) Kinetic energy of molecules and potential energy between them. D) Neither kinetic nor potential energy. Show Answer Correct Answer: C) Kinetic energy of molecules and potential energy between them. 8. Climate change has become an environmental issue. Which of the following chemicals is one of the greatest contributors to climate change? A) O$_{2}$. B) DDT. C) CO$_{2}$. D) CFC. Show Answer Correct Answer: C) CO$_{2}$. 9. Which of the following is a measurement of water pollution? A) PCB. B) COD. C) PSC. D) BOD. Show Answer Correct Answer: D) BOD. 10. Which international treaty aims to protect human health and the environment from mercury pollution? A) Kyoto Protocol. B) Montreal Protocol. C) Paris Agreement. D) Minamata Convention. Show Answer Correct Answer: D) Minamata Convention. 11. What is the main purpose of monitoring environmental chemicals, according to the Important Ideas? A) To increase industrial production. B) To detect harmful chemicals early and help protect water, air, and ecosystems. C) To ensure all chemicals are neutral on the pH scale. D) To stop natural processes like biodegradation. Show Answer Correct Answer: B) To detect harmful chemicals early and help protect water, air, and ecosystems. 12. What is the half-life of DDT in the environment? A) 20 years. B) 12 years. C) 5 years. D) 50 years. Show Answer Correct Answer: B) 12 years. 13. What is a substance that does not occur in nature but is introduced into the environment through human activity? A) Toxin. B) Chemical. C) Contaminant. D) Pollutant. Show Answer Correct Answer: C) Contaminant. 14. At room temperature, carbon dioxide is a ..... A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: C) Gas. 15. In the past hundred years, the overall amount of greenhouse gases in the atmosphere has ..... A) Decreased. B) Stayed about the same. C) Increased. D) None of the above. Show Answer Correct Answer: C) Increased. 16. Which of the following substances is the most acidic? A) Battery acid. B) Tomatoes. C) Lemon juice. D) Vinegar. Show Answer Correct Answer: A) Battery acid. 17. What is one effect of climate change mentioned in the text? A) Melting of polar ice caps. B) Increased biodiversity. C) Stable weather patterns. D) Decreased sea levels. Show Answer Correct Answer: A) Melting of polar ice caps. 18. What are the three essential elements that plants require? A) Nitrogen potassium phosphorous. B) Nitrogen potassium polonium. C) Nitrogen phosphate potassium. D) Nitrogen sulphur potassium. Show Answer Correct Answer: A) Nitrogen potassium phosphorous. 19. What is the main purpose of a life cycle assessment? A) To measure the lifespan of a product. B) To evaluate the environmental impact of a product. C) To determine the cost of production. D) To assess the market demand for a product. Show Answer Correct Answer: B) To evaluate the environmental impact of a product. 20. Which of the following gases is removed from the air by plants? A) Nitrogen. B) Helium. C) Carbon dioxide. D) Oxygen. Show Answer Correct Answer: C) Carbon dioxide. 21. In the Nitrate Test, which reagent is added slowly down the wall of the test tube using a dropping pipette? A) Ammonium molybdate reagent. B) Deionised water. C) Concentrated sulfuric acid. D) Sodium chloride solution. Show Answer Correct Answer: C) Concentrated sulfuric acid. 22. Match the term in Column A with the correct description in Column B:Pollutant A) Movement of water through a barrier to balance concentration. B) A scale from 0 to 14 that measures acidity or basicity. C) Chemicals that make the environment dirty or harmful. D) When chemicals build up in higher amounts in animals higher in the food chain. E) Plants use energy to move nutrients from soil to roots. Show Answer Correct Answer: C) Chemicals that make the environment dirty or harmful. 23. Elements that are required by organisms to survive in relatively large amounts ..... A) Micronutrients. B) Macronutrients. C) Nutrients. D) Organic compounds. Show Answer Correct Answer: B) Macronutrients. 24. Identify the wrong statement in the following.(a) Acid rain is mostly because of the oxides of nitrogen and sulphur.(b) Chlorofluorocarbons are responsible for ozone layer depletion.(c) Greenhouse effect is responsible for global warming.(d) Ozone layer does not permit infrared radiation from the sun to reach the earth. A) B. B) D. C) C. D) A. Show Answer Correct Answer: B) D. 25. An underground water supply is ..... A) Water shed. B) Erosion. C) River. D) Aquifer. Show Answer Correct Answer: D) Aquifer. 26. What is one of the activities suggested for teaching about pollution? A) Listening to lectures. B) Taking multiple-choice tests. C) Reading textbooks. D) Watching videos. Show Answer Correct Answer: D) Watching videos. 27. Which method is used to remove sulfur dioxide from industrial emissions? A) Electrostatic precipitation. B) Catalytic converters. C) Wet scrubbing. D) Incineration. Show Answer Correct Answer: C) Wet scrubbing. 28. Which statement does NOT describe the acetic acid/acetate buffer? A) The conjugate base is weak. B) It is made of a weak acid and its salt. C) CH3COOH neutralizes the extra base added. D) CH3COO-neutralizes the H+ added. Show Answer Correct Answer: A) The conjugate base is weak. 29. How many percent of oxygen in clean dry air? A) 30%. B) 15%. C) 21%. D) 10%. Show Answer Correct Answer: C) 21%. 30. What role do oceans play in regulating climate? A) Oceans primarily serve as a source of freshwater for the atmosphere. B) Oceans regulate climate by absorbing heat, distributing it through currents, and acting as carbon sinks. C) Oceans create weather patterns by generating storms. D) Oceans have no significant impact on global temperatures. Show Answer Correct Answer: B) Oceans regulate climate by absorbing heat, distributing it through currents, and acting as carbon sinks. 31. Taj Mahal is being slowly disfigured and discoloured. This is primarily due to(a) acid rain(b) soil pollution(c) water pollution(d) global warming A) D. B) C. C) B. D) A. Show Answer Correct Answer: D) A. 32. What process stores carbon long-term underground? A) Fossilisation. B) Melting. C) Decay. D) Respiration. Show Answer Correct Answer: A) Fossilisation. 33. An example of green house gas is: A) Chlorophyll. B) Ozone. C) Sulfure. D) Oxigen. Show Answer Correct Answer: B) Ozone. 34. To protect iron against corrosion, the most durable metal plating on it, is: A) Zinc plating. B) Nickel plating. C) All the above. D) None of the above. Show Answer Correct Answer: A) Zinc plating. 35. Potassium is important for cellular processes because it helps in: A) Regulating blood pressure. B) Maintaining fluid balance. C) Nerve signal transmission. D) All of the above. Show Answer Correct Answer: D) All of the above. 36. The thinning of the ozone layer is also known as the A) Ozone space. B) Ozone gap. C) Ozone hole. D) Ozone void. Show Answer Correct Answer: C) Ozone hole. 37. A mineral that the body requires in more than 100mg/day doses in order to maintain health A) Substantial element. B) Trace element. C) Micromineral. D) Macromineral. Show Answer Correct Answer: D) Macromineral. 38. Which practice contributes to air quality improvement? A) Planting more trees. B) Increasing industrial emissions. C) Using more fossil fuels. D) Cutting down forests. Show Answer Correct Answer: A) Planting more trees. 39. Why is all precipitation naturally slightly acidic? A) Due to pollution from industry. B) Due to population increase of people. C) Due to CO2 in the atmosphere dissolving in the water. D) Due to water being highly acidic. Show Answer Correct Answer: C) Due to CO2 in the atmosphere dissolving in the water. 40. Worldwide, temperatures have been increasing for more than 100 years. Is this evidence of global warming? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 41. In filtration, the clear liquid which passes through the filter paper is called A) Filter paper. B) Filtrate. C) Filter. D) Filtration. Show Answer Correct Answer: B) Filtrate. 42. What is the correct observation for the chemical test for the presence of water using white anhydrous copper(II) sulfate? A) The white powder turns pink. B) The white powder turns blue. C) The powder gives off heat and steam. D) The powder dissolves and becomes a clear solution. Show Answer Correct Answer: B) The white powder turns blue. 43. Filtration can remove insoluble impurities from water. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 44. The nitrogen cycle includes the following three compounds: A) Nitrates, nitrogen oxide, and ammonia. B) Nitrates, urea, and nitrogen oxide. C) Nitrates, ammonia, and nitric acid. D) Nitrates, ammonia, and urea. Show Answer Correct Answer: D) Nitrates, ammonia, and urea. 45. What happens to natural gas that does not contain hydrogen sulfide? A) It is converted into liquid form. B) It is considered "sour" gas. C) It is considered "sweet" gas. D) It is discarded as waste. Show Answer Correct Answer: C) It is considered "sweet" gas. 46. Which of the following releases carbon dioxide into the atmosphere? A) Feeding. B) Photosynthesis. C) Combustion. D) Fossilisation. Show Answer Correct Answer: C) Combustion. 47. Which of the following is a primary greenhouse gas responsible for global warming? A) Ozone ( $O_3$. B) Oxygen ( $O_2$. C) Carbon dioxide ( $CO_2$. D) Nitrogen ( $N_2$. Show Answer Correct Answer: C) Carbon dioxide ( $CO_2$. 48. This level of dissolved oxygen indicates that 8 mL of oxygen is found in A) 1 000 mL of water. B) 1 000 000 mL of water. C) 100 mL of water. D) 10 000 mL of water. Show Answer Correct Answer: B) 1 000 000 mL of water. 49. Why are alloys, like stainless steel, generally harder than pure metals? A) The layers of atoms in alloys are all the same size. B) The different-sized atoms in an alloy disrupt the regular layers, making it harder for them to slide. C) Alloys have more delocalised electrons, which bind the ions more tightly. D) Pure metals are mixtures, while alloys are compounds. Show Answer Correct Answer: B) The different-sized atoms in an alloy disrupt the regular layers, making it harder for them to slide. 50. What is the role of the balloon in the bioremediation process? A) To convert ounces to cubic centimeters. B) To calculate cross-sectional area. C) To measure oil volume. D) To show gas production. Show Answer Correct Answer: D) To show gas production. 51. Voltaic cells are the same as which cells? A) Galvanic. B) Anode. C) Electron. D) Electrolytic. Show Answer Correct Answer: A) Galvanic. 52. Permen LHK No. 4 Tahun 2021 mengubah sistem perizinan AMDAL dengan pendekatan berbasis risiko. Dampak potensial pendekatan ini adalah ..... A) Pelibatan masyarakat tidak diwajibkan. B) Efisiensi proses tanpa mengurangi tanggung jawab lingkungan. C) Proyek risiko tinggi tidak lagi memerlukan AMDAL. D) Penghapusan seluruh dokumen RKL dan RPL. Show Answer Correct Answer: B) Efisiensi proses tanpa mengurangi tanggung jawab lingkungan. 53. What is a major effect of carbon dioxide in high concentrations? A) Enhanced plant growth. B) Global warming. C) Decreased respiratory disorders. D) Increased oxygen levels. Show Answer Correct Answer: B) Global warming. 54. *Cattails are used to absorb chemicals in a pond. This is an example of: A) *phytoremediation. B) *photosynthesis. C) *photolysis. D) *biodegradation. Show Answer Correct Answer: A) *phytoremediation. 55. Which is an example of a renewable energy source? A) Coal. B) Oil. C) Natural gas. D) Solar panels. Show Answer Correct Answer: D) Solar panels. 56. The name rock is given when it is broken down into smaller pieces. A) Sediment. B) Erosion. C) Weathering. D) Texture. Show Answer Correct Answer: A) Sediment. 57. Which of these is the right range of BOD value from less to highly polluted water? A) 5ppm-17ppm or more. B) 4ppm-20ppm or more. C) 3ppm-9ppm or more. D) 0ppm-12ppm. Show Answer Correct Answer: A) 5ppm-17ppm or more. 58. Which action can reduce global warming? A) Increasing deforestation. B) Burning more coal. C) Reducing carbon emissions. D) Using more gasoline. Show Answer Correct Answer: C) Reducing carbon emissions. 59. Which of the following is a persistent organic pollutant (POP)? A) Ozone. B) Carbon dioxide. C) Methane. D) DDT. Show Answer Correct Answer: D) DDT. 60. What type of system allows both energy and matter exchange with its surroundings? A) Open system. B) Closed system. C) Isolated system. D) Adiabatic system. Show Answer Correct Answer: A) Open system. ← 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 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books