This quiz works best with JavaScript enabled. Home > Class 11 > 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 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. What is the half-life of DDT in the environment? A) 5 years. B) 12 years. C) 20 years. D) 50 years. Show Answer Correct Answer: B) 12 years. 3. What is a substance that does not occur in nature but is introduced into the environment through human activity? A) Pollutant. B) Contaminant. C) Toxin. D) Chemical. Show Answer Correct Answer: B) Contaminant. 4. At room temperature, carbon dioxide is a ..... A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: C) Gas. 5. 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. 6. Which of the following substances is the most acidic? A) Battery acid. B) Lemon juice. C) Vinegar. D) Tomatoes. Show Answer Correct Answer: A) Battery acid. 7. What is one effect of climate change mentioned in the text? A) Increased biodiversity. B) Melting of polar ice caps. C) Decreased sea levels. D) Stable weather patterns. Show Answer Correct Answer: B) Melting of polar ice caps. 8. What are the three essential elements that plants require? A) Nitrogen phosphate potassium. B) Nitrogen sulphur potassium. C) Nitrogen potassium phosphorous. D) Nitrogen potassium polonium. Show Answer Correct Answer: C) Nitrogen potassium phosphorous. 9. 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. 10. Which of the following gases is removed from the air by plants? A) Oxygen. B) Carbon dioxide. C) Nitrogen. D) Helium. Show Answer Correct Answer: B) Carbon dioxide. 11. 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) Concentrated sulfuric acid. C) Deionised water. D) Sodium chloride solution. Show Answer Correct Answer: B) Concentrated sulfuric acid. 12. Match the term in Column A with the correct description in Column B:Pollutant A) Chemicals that make the environment dirty or harmful. B) Movement of water through a barrier to balance concentration. C) When chemicals build up in higher amounts in animals higher in the food chain. D) A scale from 0 to 14 that measures acidity or basicity. E) Plants use energy to move nutrients from soil to roots. Show Answer Correct Answer: A) Chemicals that make the environment dirty or harmful. 13. Elements that are required by organisms to survive in relatively large amounts ..... A) Micronutrients. B) Nutrients. C) Macronutrients. D) Organic compounds. Show Answer Correct Answer: C) Macronutrients. 14. 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) A. B) B. C) C. D) D. Show Answer Correct Answer: D) D. 15. An underground water supply is ..... A) Erosion. B) River. C) Water shed. D) Aquifer. Show Answer Correct Answer: D) Aquifer. 16. 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. 17. 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. 18. 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. 19. How many percent of oxygen in clean dry air? A) 21%. B) 30%. C) 15%. D) 10%. Show Answer Correct Answer: A) 21%. 20. 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. 21. 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) A. B) B. C) C. D) D. Show Answer Correct Answer: A) A. 22. What process stores carbon long-term underground? A) Respiration. B) Decay. C) Fossilisation. D) Melting. Show Answer Correct Answer: C) Fossilisation. 23. An example of green house gas is: A) Oxigen. B) Sulfure. C) Chlorophyll. D) Ozone. Show Answer Correct Answer: D) Ozone. 24. 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. 25. 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. ← 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 10Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books