This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 14 Environmental Chemistry Quiz 20 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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) A. B) B. C) C. D) D. Show Answer Correct Answer: A) A. 2. Smallest particle of a single element A) Atom. B) Molecule. C) Compound. D) Cell. Show Answer Correct Answer: A) Atom. 3. This type of water lathers easily A) Soft. B) Temporary hard. C) Permanent hard. D) Ice. Show Answer Correct Answer: A) Soft. 4. 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. 5. A mineral that the body requires in less than 100mg/day doses in order to maintain health A) Micromineral. B) Macromineral. C) Trace element. D) None of the above. Show Answer Correct Answer: C) Trace element. 6. 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. 7. 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. 8. 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. 9. 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. 10. Arrange the order of purification process of water in correct order.I-SedimentationII-ScreeningIII-ChlorinationIV-Filtration V-Storage A) IV $\rightarrow$ II $\rightarrow$ I $\rightarrow$ III $\rightarrow$ V. B) II $\rightarrow$ IV $\rightarrow$ I $\rightarrow$ III $\rightarrow$ V. C) II $\rightarrow$ I $\rightarrow$ IV $\rightarrow$ III $\rightarrow$ V. D) IV $\rightarrow$ I $\rightarrow$ II $\rightarrow$ III $\rightarrow$ V. Show Answer Correct Answer: C) II $\rightarrow$ I $\rightarrow$ IV $\rightarrow$ III $\rightarrow$ V. 11. 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. 12. 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. 13. 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. 14. A substance that enriches soil so plants will grow better A) Herbicide. B) Pesticide. C) Fertilizer. D) Invasive species. Show Answer Correct Answer: C) Fertilizer. 15. 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. 16. Organic molecule that is often found in grains, breads and potatoes ..... A) Lipids. B) Proteins. C) Amino acids. D) Carbohydrate. Show Answer Correct Answer: D) Carbohydrate. 17. 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. 18. Which gas absorbs most of the ultraviolet radiation in the stratosphere? A) Carbon dioxide. B) Ozone. C) Nitrogen. D) Oxygen. Show Answer Correct Answer: B) Ozone. 19. A chemical used to generally control pests A) Pesticide. B) Insecticide. C) Herbicide. D) Fungicide. Show Answer Correct Answer: A) Pesticide. 20. *Hydrocarbons are made up of A) *hydrogen, oxygen, carbon. B) Hydrogen, selenium, phosphorous. C) Carbon dioxide, propane, oxygen. D) *water vapour, nitrogen, sulfur. Show Answer Correct Answer: A) *hydrogen, oxygen, carbon. 21. 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. 22. Caffeine has an LD50 for mice of 130 ppm. Which reason best explains why coffee and caffeinated soft drinks are not considered dangerous? A) Caffeine is only toxic to mice, not to humans. B) Caffeine breaks down quickly in the body. C) Caffeine is popular, so a high toxicity is still an acceptable risk. D) You would have to drink enormous amounts of caffeinated drinks to consume a dose of caffeine equivalent to the LD50 for mice. Show Answer Correct Answer: D) You would have to drink enormous amounts of caffeinated drinks to consume a dose of caffeine equivalent to the LD50 for mice. 23. 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) Anode, oxidation. B) Anode, reduction. C) Cathode, oxidation. D) Cathode, reduction. Show Answer Correct Answer: D) Cathode, reduction. 24. Which of the following is a major contributor to the formation of acid rain? A) Carbon monoxide. B) Sulfur dioxide. C) Methane. D) Ozone. Show Answer Correct Answer: B) Sulfur dioxide. 25. *Diffusion is: A) *movement from high concentration to low concentration. B) *movement from low concentration to high concentration. C) *movement from high concentration to low concentration requiring energy. D) *movement from low concentration to high concentration requiring energy. Show Answer Correct Answer: A) *movement from high concentration to low concentration. ← 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