Ncert – class 8- science – Chapter 3: Coal and Petroleum 1 Welcome to your Ncert - class 8- science - Chapter 3: Coal and Petroleum 1 1. Sewer gas is a complex mixture of: toxic gases nontoxic gases toxic and nontoxic gases inert gases None 2. Advantage of use of natural gas as fuel is: relatively expensive storage it causes less air pollution it is dangerous in case of irresponsible use natural gas has a long processing process None 3. Choose the odd one out from the following and give reason for your choice. Wind Biomass Natural gas Sun None 4. Choose the odd one out from the following and give reason for your choice. Coal Charcoal Petrol Firewood None 5. Which of the following is used as fuel in an electric generator? CNG Petrol Kerosene Diesel None 6. Which two transportation means move nearly two-thirds of all U.S. coal shipments? railroads and barges barges and coal slurry pipelines railroads and trucks trucks and covered conveyor systems None 7. Which component, obtained from the refining of petroleum, is used as a solvent in petrochemicals. Naphthalene Tar Kerosene Petroleum coal None 8. Mark the right statement about coal: Coal is an exhaustible natural resource. Coal was formed from dead remains of trees and plants buried deep beneath the earth's surface. All of these. Coal is a fossil fuel. None 9. Which of the following can not be taken to conserve energy resources (like coal and petroleum)? Solar cookers should be used to cook food whenever possible. Use stairs to climb at least up to three floors of a building instead of taking a lift. This will save electricity. The use of biogas as domestic fuel should be encouraged in rural areas. Pressure cookers should not be used for cooking food as the food is cooked in a cooker at very high pressure. None 10. The gas which occurs above the petroleum oil trapped under the rocks is called __________. natural gas petroleum gas coal gas bio gas None 11. The inorganic origin of petroleum is indicated by the fact that Its constituents can be separated by fractional distillation Carbon and hydrocarbon can combine by absorption of solar energy to give hydrocarbons Oil fields are located with the help of seismograph Petroleum contains traces of chlorophyll None 12. Natural gas is found as: layer below the glacier layer below petroleum oil deep underground layer above hot-beds layer above petroleum oil deep underground None 13. Identify the chemical which is used to detect leakage of LPG ; Ethyl mercaptan n-butyl mercaptan Methyl mercaptan Propyl mercaptan None 14. Air is a natural resource and cannot be exhausted by human activities. It is known as an inexhaustible natural resource. Which of the following is another inexhaustible natural resource? Mineral Coal Petroleum Sunlight None 15. Which kind of materials (resources) can be extinct in future? Renewable Both A and B None of these Non-renewable None 16. The advantage of ________ is that it can be used directly as fuel in homes and factories due to the ability to supply through pipes. LPG All of these Petroleum CNG None 17. Which of the following is obtained at lowest temperature by fractional distillation of petroleum? Heavy oil Kerosene Gasoline Diesel oil None 18. Which of the following petroleum product is used for dry cleaning? Petrol Kerosene Diesel Grease None 19. Dyes are used for coloring various materials like cloth and plastic. Starting material for dyes are obtained from: coal tar asphalt baking ovens zinc None 20. Which petroleum product is used for surfacing of roads? Paraffin wax Coal tar Lubricating oils Bitumen 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.
