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