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