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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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 ...
All of the exercises and questions and answers from the lesson's back end have been completed. NCERT Solutions for Class 8 Science Coal And Petroleum Chapter 5 NCERT Solutions for Class 8 Science Coal And Petroleum Chapter 5 The following is a summary in Hindi and English for the academic year . ... In this process coal tar and coal ...
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.
AllMinings 2 months ago 050 mins. Coal processing refers to the activities that are undertaken to prepare coal for use in various industries. This process involves several stages, each aimed at improving the quality and suitability of coal for specific applications. Here are the key steps involved in coal processing: Mining. Crushing and Sizing.
Engineering Chemistry Questions and Answers Coal 1. This set of Engineering Chemistry Multiple Choice Questions Answers (MCQs) focuses on "Coal 1". 1. What is the time required for the formation of young brown coals? a) 10 7 years. b) 3×10 8 years. c) 3×10 9 years.
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. chevron right.
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 ...
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.
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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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.
Coal is an abundant natural resource that can be used as a source of energy, as a chemical source from which numerous synthetic compounds (, dyes, oils, waxes, pharmaceuticals, and pesticides) can be derived, and in the production of coke for metallurgical is a major source of energy in the production of electrical power using steam generation.
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
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 ...
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.
These solutions cover important concepts in different patterns like MCQs and short answer questions, worksheets and more and help you top score good marks in the exam. ... As coal contains mainly carbon, the slow process of conversion of dead vegetation into coal is called carbonisation. Question 4: Fill in the blanks. (a) Fossil fuels are ...
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 ...
Basic Coal Preparation for Plant Operators. The course is presented over a period of 7 weeks, 2 days per week, and consists of theoretical as well as practical training. The course is mainly aimed at training plant operators in all basic principles of mineral processing. It provides plant operators with the necessary skills to master all ...
The course is aimed at more senior mineral processing personnel, and provides the student with a wider and more advanced scope regarding Coal Preparation and utilisation in general. It also prepares the student to play a more meaningful role in the management of the ore beneficiation environment. It is presented during four 3week study schools ...
Question. The processing of raw coal involves "washing," in which coal ash (nonorganic, incombustible material) is removed. The article "Quantifying Sampling Precision for Coal Ash Using Gy's Discrete Model of the Fundamental Error" (Journal of Coal Quality, 1989:3339) provides data relating the percentage of ash to the density of a ...
Here you can get Class 8 Important Questions Science based on NCERT Text book for Class 8. Science Class 8 Important Questions are very helpful to score high marks in board exams. Here we have covered Important Questions on Coal and Petroleum for Class 8 Science subject. Very Short Answer Questions. 1. Write the names of two natural substances.
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