We get Naphthalene ball from coal tar. Answer. 6. A good fuel must leave very little ash after burning. Answer. 7. Petroleum is found in pure form under the sedimentary rocks. Answer. We hope the given NCERT MCQ Questions for Class 8 Science Chapter 5 Coal and Petroleum with Answers Pdf free download will help you.
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Due to natural process the forests get buried under the soil and got compressed. Due to the change in temperature dead plants got converted into a fossil called coal. ) Fill in the blanks. The slow process of conversion of dead vegetation into coal is called carbonisation. Coal gas is obtained during the processing of coal to get coke.
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Question 1. Very short answer type questions: (i)Name two types of natural resources. (ii)Define the term "Carbonisation". (iii)Which type of coal is also known as black lignite? (iv)In which process coal is heated up to 1000°C in the absence of air to form useful components? (v)Which component is a mixture of hydrogen, methane, carbon ...
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The process of peat getting buried under sediments and turning into coal continues as a cycle, as long as the conditions are suitable. This is why we see numerous layers of coal seams in certain sedimentary basins. Types of Coal. The process by which something changes under the effect of pressure and temperature is known as metamorphism in geology.
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Short Answer. Expert verified. ... or barges for transportation to coal processing plants or industrial locations. Transporting coal can be a challenging and costly process, as it often requires the construction of new infrastructure, such as railways and ports. ... Most popular questions from this chapter. Chapter 9.
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As grate moves along the length of the furnace, the coal burns before dropping off at the end as ash. Some degree of skill is required, particularly when setting up the grate, air dampers and baffles, to ensure clean combustion leaving the minimum of unburnt carbon in the ash. The coalfeed hopper runs along the entire coalfeed end of the furnace.
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Which gas is formed when coal is heated in the absence of air? Answer: The process of burning or heating coal in the absence of air is known as destructive distillation. As a result of this process, coal tar and coal gas are produced. The coal gas is a mixture of gases containing hydrogen (H 2), methane (CH 4) and carbon monoxide (CO). Q7.
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Q13: Name the substances obtained from the coal tar and used to repel moths and insects. Ans: Naphthalene balls Q14: What is the name of the process in which coal is heated in the absence of air? Ans: The process is called destructive distillation of coal. Q15: Name two fractions of petroleum which are used as a fuel. Ans: Petroleum and Diesel
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The coal mining industry has seen a steady rise in the past few years. According to estimates, the global coal market is forecasted to grow at a compound annual growth rate of percent from 2019 to 2023. Starting a coal mining business involves obtaining the necessary permits, licenses, and financial resources.
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Name three products obtained after the processing of coal. Also mention their uses. Ans. The slow process of conversion of wood into coal is called carbonisation. ... These are multiple choice questions or fillintheblanks, shortanswer questions, and longanswer questions. A few long answer questions are mentioned in the NCERT exercise ...
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Download Solution PDF. The correct answer is Fortification. Food fortification is the process of adding micronutrients (essential trace elements and vitamins) to food. It is the practice of deliberately increasing the content of an essential micronutrient, vitamins and minerals (including trace elements) in a food.
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Sulfur dioxide, SO2, is a colorless gas or liquid with a strong, choking odor. It is produced from the burning of fossil fuels (coal and oil) and the smelting of mineral ores (aluminum, copper, zinc, lead, and iron) that contain sulfur. In nature, volcanic eruptions can release sulfur dioxide into the air.
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Fig. : A coal mine Coal Gas Coal gas is obtained during the processing of coal to get coke. It is used Coal gas was used for street lighting for the first time in London in 1810 and in New York around 1820. Now a days, it is used as a source of heat rather than light. These days, bitumen, a petroleum product, is used in place of coaltar
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Answer: Flame is a region where the burning or combustion of gaseous substances take place. Question 13. Define fuel. Answer: Those substances which provide energy on burning are called 'fuels';, coal, petroleum, LPG, etc. Question 14. Give two examples each of solid fuels, liquid fuels and gaseous fuels. Answer:
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outside the mining area for placement and storage. In the Midwest, where the surface topography and coal seams are generally flat, it is common to employ area strip mining in which the fragmented overburden is placed directly by large draglines in the space created where coal has been mined ().In some situations in the eastern United States, a coal seam occurring near the top of mountains is ...
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Short Answer Type Questions. Question 1: Write some uses of coal. Answer: Uses of coal: ... Many useful products; like coke, coal tar and coal gas; are made by processing coal. Question 2: What is coke? Answer: Coke is almost pure form of carbon, is tough, porous and black. Coke is used in manufacture of steel and extraction of many metals.
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Free download in PDF Mining Engineering General Knowledge Multiple Choice Questions(MCQs) Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
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Coal and Petroleum Class 8 Extra Questions Very Short Answer Type. Question 1. Name some renewable sources of energy. Water, wind, solar. Question 2. Give some examples of fossil fuels. Coal, petroleum, natural gas. Question 3. Name the elements present in coal.
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It is obtained during the processing of coal to get coke. Coal gas contains a variety of gases like hydrogen, carbon monoxide, methane and some volatile hydrocarbons. It also contains small quantities of gases such as carbon dioxide and nitrogen. It is used as a fuel in many industries situated near the coal processing plants. Question 29.
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Coal and Petroleum Class 8 Extra Questions Very Short Answer Questions. Coal And Petroleum Class 8 Extra Questions Question 1. Name some renewable sources of energy. Answer: Water, wind, solar. ... Question 9. The process of conversion of wood into coal is called (a) carbonisation (b) catagenesis (c) carboniferous (d) none of these.
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Coal is a black sedimentary rock. It usually occurs in coal beds found in coal mines. Coal comprises of carbon, hydrogen, oxygen, sulphur, etc. When dead plants and animals decay and convert into peat which in turn is converted into lignite, then subbituminous coal, after that bituminous coal, and lastly anthracite. Hence, coal is a fossil fuel.
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Transporting coal Coal can be transported from mines and processing plants to consumers in several different ways: Conveyors, trams, and trucks move coal around mines, short distances from mines to consumers close to the mines, or to other modes of longdistance transportation. How does coal get out of the ground?
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Coal and Petroleum. 1. Read the following statements and select the correct ones. A. Coal, petroleum and natural gas are fossil fuels. B. Coal and natural gas are exhaustible resources. C. Coke is used in the manufacture of steel. D. Fossil fuels are present in limited quantities.
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Underground mining, we also call deep mining. It is a process that extracts coal from deep below the Earth's surface—may be as far as 300meters. For coal mining, you need use many coal mining machines like the conveyor belt. This is a complicated process and you are better to find a professional team to build the coal mining plant.
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Chemistry Fuels and Combustion Important Questions and Answers: Fuels and Combustion. 1. How fuels are classified. Give one example for each. Based on Occurrence 2 Types. Primary Fuels It occurs in nature such as. Ex: Coal, Crude oil, Natural Gas. Secondary Fuels It is derived from primary fuels.
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First, put vinegar and water in equal amounts and then run the boiler. This will swell the rusting from inside due to the steam formation and thus clean with hand by switching off the boiler. Q. How to bleed a boiler. Ans. Boiler flushing or boiler bleeding is a process of cleaning out the boiler inside and breaking out the jam inside the pipes.
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The LFC process consistently produced 250 short tons/day of PDF and 250 barrels/day of CDL from 500 short tons of runofmine coal per day. The PDF contains percent sulfur with a heat content of 11,100 Btu/lb (compared with percent sulfur and 8,300 Btu/lb for the feed coal) [ 1 ].
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Answer: Coal when processed in industry gives coke, coal tar and coal gas. Coke is used in the manufacture of steel and in extraction of many metals. Coal tar is used as starting material for manufacturing various substances such as synthetic dyes, drugs, explosives, perfumes, paints, etc. Coal gas is used as a fuel.
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Very Short Answer Type Questions. Question. 13 You are provided with a mixture of petroleum and water. Can you suggest a method to separate the two? ... Uses of coal gas It is used as a fuel in many industries situated near the coal processing plants. Question. 28 We say fossil fuels will last only for a few hundred years. Comment.
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(c) The black, thick liquid with an unpleasant smell is known as coal tar. (d) During the processing of coal to get coke, coal tar and coal gas are also obtained. (e) The process of separating the various constituents of petroleum is known as Fractional Distillation. (f) Excessive burning of fossil fuels is a major cause of Global Warming.
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Transporting coal. Coal can be transported from mines and processing plants to consumers in several different ways: Conveyors, trams, and trucks move coal around mines, for short distances from mines to that are consumers close to the mines, or to other modes of longdistance transportation. Trains transport nearly 70% of coal deliveries in the ...
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Engineering Chemistry Questions and Answers Coal Technology. This set of Engineering Chemistry Multiple Choice Questions Answers (MCQs) focuses on "Coal Technology". 1. How do the noncoking coals are subjected to consumers in India? a) By washing. b) By sizing. c) By sorting. d) By blending. View Answer.
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Practice MCQ Questions for Class 8 Science with Answers on a daily basis and score well in exams. Refer to the Coal and Petroleum Class 8 MCQs Questions with Answers here along with a detailed explanation. Coal and Petroleum Class 8 MCQs Questions with Answers. Choose the correct option.
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