Students of ICSE Class 10 should refer to Safe Disposal Of Waste ICSE Class 10 Geography previous year questions and solutions. below which have come in past board exams. You should always go through questions that have come in previous years. This will help you to understand the pattern of questions in ICSE Class 10 Geography and prepare accordingly. This will help you to get better marks in ICSE Class 10 Board Exams
ICSE Class 10 Geography Safe Disposal Of Waste Last Year Questions
Students should learn the important questions and answers given below for Chapter Safe Disposal Of Waste in Geography for ICSE Class 10. These board questions are expected to come in the upcoming exams. Students of ICSE Class 10th should go through the board exams questions and answers for ICSE Class 10 Geography which will help them to get more marks in exams.
Board Exam Questions Safe Disposal Of Waste ICSE Class 10 Geography
Question. Name two useful products which can be made from biodegradable domestic waste.
Answer: Compost and gobar gas.
Question. How is the water polluted by open dumping of waste ?
Answer: At a open dumping site rainwater could carry the harmful substances to the nearby streams, ponds or lakes and if the water seeps down it could pollute the groundwater.
Question. Give two advantages of dumping waste in sanitary landfill. OR What are the advantages of sanitary landfill as opposed to open dumping ?
Answer: The advantages of sanitary landfill are:
(i) It is free from the pollution from burning.
(ii) The health problems are minimised since flies, rats and other pests cannot breed in the landfill because of the covered wastes.
(iii) It is mostly free from fire hazards.
Question. What steps should be taken by the municipal authorities for the safe disposal of solid waste ?
Answer: To prohibit littering, the following steps should be taken by the municipal authorities:
(i) Organising house-to-house collection of municipal solid wastes.
(ii) Arranging collection of waste from slums and squatter areas or localities including hotels, restaurants, office complexes and commercial areas.
(iii) Bio – medical wastes and industrial wastes should not be mixed with municipal solid wastes.
(iv) Horticultural and construction wastes should be separately collected and disposed off.
(v) The waste sho ul d be s e g re g ate d into b i o de g rad abl e and nonbiodegradable.
(vi) Waste (garbage, dry leaves) should not be burnt.
(vii) Stray animals should be allowed to move around waste storage facilities.
Question. Why is open dumping not considered as an environment friendly method?
Answer: (i) In this method, waste materials are dumped in open low lands far away from the city environment friendly.
(ii) The open pits spoil the sight of the area and become a breeding ground for mosquitoes, flies, insects etc., that are the carriers of harmful diseases.
Question. What chemicals are used to make water totally free from micro-organisms ?
Answer: In order to get rid of micro-organisms chlorine and bleaching powder is added to the water.
Question. What do you mean by segregation of waste ?
Answer: Sorting out of the re-usable materials from heaps of waste is called segregation of waste.
Question. Explain Bengaluru method of composting.
Answer: (i) In the mechanical process, used in Bengaluru and adopted by other cities in the country, the waste material is placed in layers about one meter deep.
(ii) The material is not turned at all but it decomposes completely in about five months. This method of composting is known as the Bengaluru Method.
Question. Give three advantages of using compost.
Answer: The major benefits of composting are: (Write any three)
(i) It enhances soil nutrients and water retention capacity of soils.
(ii) It suppresses plant diseases.
(iii) It rejuvenates poor soils by adding humus
(iv) It absorbs odours and degrading volatile organic compounds.
(v) It prevents pollution by preventing pollutants in storm water run – off from draining into ware resources.
(vi) It checks soil erosion and silting on embankments
(vii) It reduces cost as there is no need for excess water, fertilisers and pesticides.
Question. What is composting ?
Answer: (i) Composting is nature’s process of recycling decomposed organic materials into a rich soil known as compost.
(ii) It is a good fertilizer for plants.
Question. What is open dumping of wastes ?
Answer: (i) In this method, waste materials are dumped in open low lands far away from the city.
(ii) It is the cheapest method of waste disposal and does not need much planning.
Question. How is compost made ?
Answer: The organic wastes from households are made to undergo decomposition in such a way that bacteria and other micro-organisms break them down and produce a safe, clean and soil – like material called compost.
Question. What service is indirectly done by the rag-pickers for the disposal of waste ?
Answer: (i) In a country like India, the poor garbage collectors make a living from discarded solids. In this way they do a good job by removing much of the waste form the garbage dumps.
(ii) Pieces of metal, glass, rubber, plastics etc., are removed to be recycled to get finished products.
Question. What is a sanitary landfill ?
Answer: (i) In this method, the waste is packed and dumped daily at the site and is covered with earth to prevent insects or rodents from entering into the landfill.
(ii) The waste then is subjected to bacterial decomposition.
(iii) Physical, chemical and biological reactions take place generating different gases like carbon dioxide, methane, ammonia and hydrogen sulphide.
Question. Explain Indore method of composting.
Answer: (i) In India, both the manual as well as mechanical methods of composting are used.
(ii) In the rural areas composing refuse and night soil mixtures are dumped together which produce manure for the fields.
(iii) Layers of vegetable waste and night soils are alternated in a shallow hole hug in the ground.
(iv) The mixture is turned regularly for about three months to provide air to the mixture.
(v) Then the compost is left for another month without turning for the process to take effect. This method of composting is known as the indore method.
Question. How is waste disposed of in a sanitary landfill ?
Answer: The waste undergoes the following five phases :
(i) During the first phase of the operation, aerobic bacteria deplete the available oxygen and as a result the temperature increases.
(ii) In the second phase, anaerobic conditions become established and hydrogen and carbon dioxide are evolved.
(iii) Phase three establishes population of bacteria and the beginning of me than ogenic activity , i .e ., production of methane from the decomposition of organic matter.
(iv) In the fourth phase the methanogenic activity becomes stabilized.
(v) The fifth phase depletes the organic matter and the system returns to aerobic state.
Question. Explain the role of segregation of waste in the safe disposal of waste.
Answer: (i) Sorting out of the reusable material form heaps of waste may often involve much manual labour.
(ii) Pieces of metal, glass, rubber, plastics etc., are removed to be recycled to get finished products.
