Every question from this NCERT chapter, with a detailed explanation.
With reference to the disposal of garbage in landfills, consider the following statements: 1. A landfill is an open low-lying area used to dump both useful and non-useful components of garbage without separation. 2. Once full, a landfill is immediately used for agricultural purposes. 3. Landfill sites are often converted into parks or playgrounds after closure. Which of the statements given above is/are correct?
Consider the following statements regarding the burning of agricultural waste: 1. Burning dried leaves releases oxygen into the atmosphere. 2. Composting converts these wastes into useful manure. 3. These wastes can be converted into useful compost instead of being burnt. Which of the statements given above is/are correct?
With reference to 'Vermicomposting', consider the following statements: 1. It is a method of preparing compost with the help of redworms. 2. Redworms are a type of chemical agent used to decompose waste. 3. This method requires the addition of chemical fertilizers to accelerate decomposition. Which of the statements given above is/are correct?
Which environmental conditions are most conducive to the survival of redworms in a vermicomposting pit?
Consider the following materials: 1. Vegetable peels 2. Coffee and tea remains 3. Pickles and vinegar 4. Milk preparations Which of the materials given above should NOT be added as food for redworms in a vermicomposting pit?
In the anatomical organisation of a redworm, the structure known as the gizzard is primarily involved in which of the following functions?
Consider the following statements regarding the feeding habits of redworms: 1. A redworm can eat food equal to its own weight in a day. 2. Redworms possess sharp teeth to chew tough organic matter. 3. Redworms grind their food using a structure called a gizzard. Which of the statements given above is/are correct?
Why is it inadvisable to add animal by-products like meat or dairy to a vermicomposting pit?
What is the primary ecological role of redworms in the process of vermicomposting?
With reference to the environmental impact of plastics, consider the following statements: 1. Plastics release beneficial nutrients into the air upon burning. 2. Plastics can be recycled into useful products. 3. The gases released by burning plastics can cause health problems in humans. Which of the statements given above is/are correct?
In the process of converting biodegradable waste into usable manure, the primary role of redworms is to:
Consider the following consequences of careless disposal of plastic bags: 1. Choking of drains and sewer systems. 2. Stray animals are immune to the harmful effects of ingesting plastic. 3. Plastic decomposition significantly increases soil fertility. Which of the consequences given above are correct?
Which of the following practices is recommended to minimize the overuse of plastics? 1. Insisting on paper bags from shopkeepers. 2. Burning plastic bags is the most eco-friendly method of disposal. 3. Using cloth or jute bags for shopping. Select the correct answer using the code given below:
With reference to the disposal of hazardous waste materials, what is the appropriate treatment for plastic containers that have been used to store toxic chemicals?
What is the major environmental and health hazard associated with the open burning of plastic waste?
The traditional material "Papier-mâché" is primarily prepared using a mixture of:
Which of the following pairs regarding waste disposal is correctly matched? Method | Description 1. Landfill | Area for dumping collected garbage 2. Composting | Converting plastics into manure 3. Vermicomposting | Using chemical fertilizers to rot waste 4. Recycling | Burning waste to produce energy
Which of the following items found in garbage can be reused or recycled? 1. Glass bottles 2. Metal scraps 3. Old newspapers 4. Plastic bags Select the correct answer using the code given below:
Consider the following statements regarding the role of 'Safai karamcharis': 1. Safai karamcharis are responsible for manufacturing plastic bags. 2. They separate useful garbage from non-useful garbage at the landfill. 3. They help in the management of waste disposal. Which of the statements given above is/are correct?
With reference to the decomposition of waste, consider the following statements: 1. All plant and animal wastes are biodegradable and can be converted into manure. 2. The conversion of materials into manure is technically called 'incineration'. 3. Plastics and glass decompose faster than organic waste. Which of the statements given above are correct?
In the context of waste management, which of the following statements best reflects the principle of resource recovery?
Consider the following statements regarding the use of plastics: 1. Certain types of single-use plastics are banned in India. 2. Excessive use of plastics has no negative impact on the environment. 3. Some plastics can be recycled into useful products. Which of the statements given above is/are correct?
Which of the following individual actions most effectively contributes to the reduction of plastic waste generation?
Consider the following statements about the disposal of plastics: 1. Burning plastics is a safe method if done in open areas. 2. Plastics thrown on roads can choke drains. 3. Animals eating from plastic bags may die. Which of the statements given above are correct?
What distinguishes vermicomposting from traditional composting methods?