Here’s a question bank based on Chapter 7: Water, covering its occurrence, properties, hardness, pollution, and related effects. The questions are categorized into short questions with varying difficulty levels.
### Short Questions (Total: 120)
#### Easy Questions (36)
1. What is water?
2. What is the chemical formula of water?
3. Where is water predominantly found on Earth?
4. Name the three states of water.
5. What are the physical properties of water?
6. Why is water called a universal solvent?
7. What is the polar nature of water?
8. Describe hydrogen bonding in water.
9. What is soft water?
10. What is hard water?
11. List one cause of water hardness.
12. Name the two types of hardness in water.
13. What is temporary hardness?
14. What is permanent hardness?
15. How can temporary hardness be removed?
16. Describe Clarke’s method for removing hardness.
17. How can permanent hardness be removed?
18. Name one disadvantage of hard water.
19. What is water pollution?
20. What are industrial effluents?
21. What are domestic effluents?
22. What are agricultural effluents?
23. List one effect of water pollution.
24. What are waterborne infectious diseases?
25. How can waterborne diseases be prevented?
26. What role does water play in biological processes?
27. What is the importance of water for living organisms?
28. Explain the concept of water cycle.
29. How does water pollution affect aquatic life?
30. What are some common water pollutants?
#### Moderate Questions (48)
31. Discuss the occurrence of water on Earth.
32. Explain the significance of water's polar nature.
33. How does hydrogen bonding affect the properties of water?
34. Describe the characteristics of soft water.
35. Explain the difference between temporary and permanent hardness.
36. What are some methods for removing temporary hardness from water?
37. Discuss the methods used to remove permanent hardness.
38. Analyze the disadvantages of using hard water for domestic purposes.
39. What are the main sources of industrial effluents?
40. How do domestic effluents contribute to water pollution?
41. Discuss the impact of agricultural effluents on water bodies.
42. Explain how water pollution can lead to health issues.
43. What are some examples of waterborne diseases?
44. Describe the prevention methods for waterborne diseases.
45. Discuss the ecological effects of water pollution on ecosystems.
46. Explain how water acts as a solvent in chemical reactions.
47. How does the extensive hydrogen bonding ability of water influence its boiling point?
48. What measures can be taken to reduce water pollution from industrial sources?
49. Discuss the impact of heavy metals in water from industrial effluents.
50. How do detergents contribute to water pollution?
51. Explain the importance of water quality in agriculture.
52. How can water be treated to remove contaminants?
53. Discuss the role of microorganisms in water pollution.
54. How does nutrient pollution affect water bodies?
55. Explain the concept of water conservation.
56. What are some effects of using hard water in washing clothes?
57. Describe the role of filtration in removing hardness from water.
58. Discuss the importance of clean water for public health.
59. How does groundwater become polluted?
60. Explain the effects of oil spills on water bodies.
#### Tough Questions (36)
61. Analyze the effects of climate change on water availability.
62. Discuss the long-term impacts of water pollution on human health.
63. Evaluate the effectiveness of current water purification methods.
64. Discuss the impact of urbanization on water quality.
65. Explain the process of eutrophication and its effects on aquatic ecosystems.
66. Analyze the role of government policies in managing water resources.
67. Discuss the challenges of treating agricultural runoff in water management.
68. Evaluate the socio-economic implications of water pollution in communities.
69. Discuss the consequences of plastic waste in water bodies.
70. Analyze the effectiveness of international treaties in addressing water pollution.
71. Discuss how public awareness campaigns can reduce water pollution.
72. Evaluate the role of technology in monitoring water quality.
73. Explain the relationship between water quality and food safety.
74. Discuss the role of wetlands in purifying water.
75. Analyze the challenges faced in developing countries regarding water pollution.
76. Discuss the impact of mining activities on water resources.
77. Evaluate the role of NGOs in addressing water pollution issues.
78. Discuss the impact of thermal pollution on aquatic life.
79. Analyze the relationship between water scarcity and pollution.
80. Discuss how climate change exacerbates water quality issues.
81. Explain the challenges in managing urban water supply and pollution.
82. Discuss the impact of pharmaceutical waste on water quality.
83. Analyze the significance of watershed management in preventing water pollution.
84. Evaluate the effectiveness of community-led initiatives in improving water quality.
85. Discuss how industrial practices can be made more sustainable to protect water resources.
86. Explain the long-term environmental consequences of untreated sewage discharge.
87. Analyze the effects of agricultural practices on the physical and chemical properties of water.
88. Discuss the challenges of maintaining water quality in large water supply systems.
89. Evaluate the role of education in promoting sustainable water use practices.
90. Discuss the implications of invasive species in freshwater systems.
### Long Questions (Total: 10)
#### Easy Questions (3)
1. Define water and explain its importance to life on Earth.
2. Describe the properties of water that make it essential for living organisms.
3. What is the water cycle? Explain its stages.
#### Moderate Questions (4)
4. Discuss the causes of water hardness and the methods to remove it.
5. Explain the different types of water pollution and their sources.
6. Describe the effects of water pollution on human health and the environment.
7. Discuss the methods for preventing waterborne diseases.
#### Tough Questions (3)
8. Analyze the impact of industrial, domestic, and agricultural effluents on water quality.
9. Discuss the long-term consequences of water pollution on ecosystems and human health.
10. Evaluate the effectiveness of water management strategies in addressing pollution and conserving resources.