Ncert – class 8- science – Chapter 3: Coal and Petroleum 2 Welcome to your Ncert - class 8- science - Chapter 3: Coal and Petroleum 2 1. 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. Both Assertion and Reason are true. Reason is not the correct explanation of Assertion. Both Assertion and Reason are true. Reason is the correct explanation of Assertion. Both Assertion and Reason are false. Assertion is true and Reason is false None 2. A petroleum fraction having boiling range 70−200 ∘C and containing 6−10 carbon atoms per molecule is called: gas oil kerosene natural gas gasoline None 3. Which of these resources are in the danger of getting depleted with use? Coal Both Coal and Petroleum None Petroleum None 4. Which of the following properties is NOT a characteristic of a good fuel? Causes minimum pollution High ignition temperature Low cost Readily available None 5. Why is foundry coke used in boilers and furnaces? Excellent source of heat Excellent insulator None of above Excellent source of light None 6. Coal tar belongs to a class of drugs known as: none of above aldehydes keratoplastics alcohols, None 7. Coal is obtained by: refining carbonization decomposition of dead aquatic animals none of above None 8. What is the source of fly ash Petroleum Natural gas Coal All of the above None 9. ________ is among the by-products when coal is carbonized to make coke. Coal Coal tar All of above Carbon dioxide None 10. ............. is a flammable gaseous fuel made from coal and supplied to the user via a piped distribution system. Coal tar None of these Coal gas Coke None 11. Which of these is the main constituent of petroleum gas? Ethane Butane Methane Propane None 12. 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. Lubricating oil Petrol Coke Kerosene None 13. ______ has the highest carbon purity and is used to manufacture energy. None of the above Petrol coke Both A and B Calcinated pet coke None 14. Which of these is not a physical property of coke? Tough None of above White Porous None 15. Coking coal is coal which on carbonisation goes through: softening swelling. All of the above. resolidification 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.
