Practice Quiz or MCQ (Multiple Choice Questions) with solutions are available for Practice, which would help you prepare for chapter Coal and Petroleum, Class 8, Science. You can practice these practice quizzes as per your speed and improvise the topic.Q.Coke is obtained from :a)destructive distillation of petroleumb)refining of coalc)destructive distillation of coald)refining of petroleumCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Destructive distillation is the chemical process involving the decomposition of coal by heating to a high temperature in the absence of air. It is used for obtaining coke from coal.

Answer

Destructive distillation of coal means 'the process breaks up or 'cracks' large molecules'. Coke, coal gas, gas carbon, coal tar, ammonia liquor, and 'coal oil' are examples of commercial productshistorically produced by the destructive distillation of coal.

Answer

Coke is obtained from the destructive distillation of coal.

Explanation:

Destructive distillation of coal:
- Coke is a solid carbonaceous material that is obtained by heating coal in the absence of air.
- This process is known as destructive distillation, where coal is heated to a high temperature (around 1100-1200 degrees Celsius) in the absence of air or oxygen.
- During this process, coal undergoes thermal decomposition and various volatile components like gases and tar are driven off, leaving behind a residue called coke.
- Coke is a hard, porous, and carbon-rich material that is used as a fuel and in the production of iron and steel.

Importance of coke:
- Coke is extensively used as a fuel in industries due to its high carbon content and low impurities.
- It has a high calorific value, making it an efficient fuel for various industrial processes.
- In the production of iron and steel, coke is used as a reducing agent in the blast furnace. It reacts with iron ore to remove oxygen and produce molten iron.
- Coke also provides the necessary heat and carbon for the smelting process in the production of steel.

Refining of coal and petroleum:
- Refining is a process used to separate and purify different components from crude oil or coal.
- In the case of coal, it is not refined but undergoes destructive distillation to obtain coke.
- Petroleum refining involves various processes like distillation, cracking, and reforming to obtain different fractions such as gasoline, diesel, and kerosene.

Conclusion:
Coke is obtained from the destructive distillation of coal, where coal is heated in the absence of air to drive off volatile components and leave behind a carbon-rich residue. This process is different from the refining of coal or petroleum, which involves separating and purifying different components.

Similar Class 8 Doubts

Practice Quiz or MCQ (Multiple Choice Questions) with solutions are available for Practice, which would help you prepare for chapter Coal and Petroleum, Class 8, Science. You can practice these practice quizzes as per your speed and improvise the topic.Q.Coke is obtained from

Coal gas can be obtained from

what is Destructive Distillation? Related: Short Notes - Coal and Petroleum, Science, Class 8?

By what process is petroleum refined?

what do you mean by destructive distillation

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