Waste Generation and Management – Sources & Disposal Quiz - ICSE Class 9 Biology
Free practice quiz: Waste Generation and Management – Sources & Disposal (ICSE Class 9 Biology). 48 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
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Which of the following is a primary source of non-biodegradable waste in urban environments?
- Kitchen scraps
- Animal manure
- Plastic packaging
- Fallen leaves
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Answer: C. Plastic packaging
Plastic packaging is a synthetic material that does not readily decompose by natural biological processes, making it a significant source of non-biodegradable waste. Kitchen scraps, animal manure, and fallen leaves are all biodegradable.
The presence of heavy metals in e-waste poses a significant risk because they:
- Are easily biodegradable
- Can leach into soil and water, causing contamination
- Are converted into harmless gases during decomposition
- Are beneficial for plant growth
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Answer: B. Can leach into soil and water, causing contamination
Heavy metals like lead, mercury, and cadmium, found in e-waste, are persistent environmental pollutants. When e-waste is improperly disposed of, these metals can leach into the soil and water bodies, leading to severe contamination and health risks.
Which gas is primarily produced during the anaerobic decomposition of organic waste in landfills?
- Oxygen
- Nitrogen
- Methane
- Hydrogen
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Answer: C. Methane
Anaerobic digestion of organic matter in landfills releases a mixture of gases, predominantly methane (CH4) and carbon dioxide (CO2). Methane is a significant greenhouse gas.
What is the primary goal of reducing waste generation?
- To increase the amount of material available for recycling
- To decrease the overall environmental impact of waste
- To maximize the use of landfills
- To encourage the production of more disposable products
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Answer: B. To decrease the overall environmental impact of waste
Reducing waste at its source is the most effective way to minimize the environmental burden associated with waste, including resource depletion, pollution, and greenhouse gas emissions.
The process of treating waste by burning it at very high temperatures, often with heat recovery for energy generation, is:
- Composting
- Landfilling
- Incineration
- Vermicomposting
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Answer: C. Incineration
Incineration is a thermal treatment process for waste that involves controlled combustion at high temperatures. Many modern incineration facilities are designed to capture the heat produced and convert it into electricity or heat.