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.
Coal mining Underground, Surface, Drilling: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam depends on many technological, economic, and ...
Answer: 1. This picture shows shore drilling of oil. 2. Deep wells bored to take petroleum and natural gas out is called drilling. Map Skills Class 8 Geography Chapter 3 Mineral and Power Resources. Question 1. On an outline Map of the World mark the following: (i) Countries of Asia with large iron deposits.
Physical and chemical changes took place as a result of heat and temperature extracting out all oxygen leaving the plant layers with carbonrich content, thus resulting in the formation of coal over a period of time. Also, read Forests. Types Of Coal. Coal is a readily combustible rock containing more than 50% by weight of carbon.
Study with Quizlet and memorize flashcards containing terms like Most of the world's energy and mineral resources derive from a. solar materials and processes. b. geologic materials and processes. c. hydrosphere materials and process. d. biological materials and processes., Most of the world's energy supply comes from ________. a. fossil fuels b. wind c. nuclear power d. water, Which of the ...
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.
The coal delivered from the mine that reports to the coal preparation plant is called runofmine, or ROM, coal. This is the raw material for the CPP, and consists of coal, rocks, middlings, minerals and contamination. Contamination is usually introduced by the mining process and may include machine parts, used consumables and parts of ground ...
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.
The coal industry serves a vital role in the nation's economy by producing fuel for more than half of its electricity. Despite the industry's importance, industry financial data for 2005—the strongest year for the coal industry in recent years—shows that it is a relatively small industry with revenues totaling 20 billion to 25 billion and net income between 1 billion and 2 ...
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.
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.
Ans: Followings are the correct matching for the given items (a)(iii) (b)(iv) (c)(i) (d)(ii) Long Answer Questions. 27. Name the products obtained and their uses when coal is processed in industry. Ans: Following products can be obtained by processing coal in the industry (i) Coal tar used in making roads.
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.
Coal mines and coalpreparation plants have caused much environmental damage. Surface mining, or strip mining, destroys natural habitats, and one type of surface mining, known as mountaintop removal mining, dramatically and irreparably alters the topography of the area. Surface areas exposed during mining, as well as coal and rock waste (which were often dumped indiscriminately), weather ...
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.
Coal and Petroleum Class 8 Extra Questions Very Short Answer Questions. 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.
1. Coal and petroleum processing Read online for free.
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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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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Short Answer Type Question Answers. Ans. 1. ... Thus, formation of coal is a long drawn process spread over various periods. Ans. 7. Nuclear energy is expected 10 play an increasingly important role in India clue to the following reasons (i) India has limited reserves of coal and petroleum. Nuclear energy minerals like Thorium are found in ...
(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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