Ncert – class 8- science – Chapter 3: Coal and Petroleum 2 Welcome to your Ncert - class 8- science - Chapter 3: Coal and Petroleum 2 1. Which of these resources are in the danger of getting depleted with use? Petroleum Coal None Both Coal and Petroleum None 2. Why is foundry coke used in boilers and furnaces? Excellent source of light None of above Excellent source of heat Excellent insulator None 3. A petroleum fraction having boiling range 70−200 ∘C and containing 6−10 carbon atoms per molecule is called: natural gas gasoline gas oil kerosene None 4. Which of the following properties is NOT a characteristic of a good fuel? Causes minimum pollution Low cost Readily available High ignition temperature None 5. Coking coal is coal which on carbonisation goes through: resolidification softening All of the above. swelling. None 6. Which of these is not a physical property of coke? White None of above Porous Tough None 7. ............. is a flammable gaseous fuel made from coal and supplied to the user via a piped distribution system. Coal gas Coal tar None of these Coke None 8. ________ is among the by-products when coal is carbonized to make coke. Coal tar Coal Carbon dioxide All of above None 9. What is the source of fly ash Petroleum Natural gas All of the above Coal None 10. Study the characteristics given below: (i) It is a tough, porous and black substance. (ii) It is a pure form of carbon. Based on the above characteristics, identify it from the following. Petrol Coke Lubricating oil Kerosene None 11. ______ has the highest carbon purity and is used to manufacture energy. Petrol coke Calcinated pet coke None of the above Both A and B None 12. Coal is obtained by: carbonization none of above refining decomposition of dead aquatic animals None 13. Assertion: Fuel oil is better than coal for use in industries.Reason: It has a high calorific value than coal and does not leave smoke or ash on burning. Assertion is true and Reason is false Both Assertion and Reason are false. Both Assertion and Reason are true. Reason is the correct explanation of Assertion. Both Assertion and Reason are true. Reason is not the correct explanation of Assertion. None 14. Which of these is the main constituent of petroleum gas? Propane Ethane Methane Butane None 15. Coal tar belongs to a class of drugs known as: aldehydes none of above keratoplastics alcohols, None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
