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