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Fill in the blanks: 1. Hydrogen gas obtained from natural gas is used in the production of ………2. Hydrocarbons are present in different …………. and …………3. Hydrocarbons are less dense than ……… 4. Sewage sludge can also be decomposed by microorganisms to produce methane gas along with impurities like carbon dioxide and ……… 5. ………… can also be used as refrigerants.6. ………. is used as a fuel gas and propellant in aerosol sprays such as deodorants. 7. ………. natural gas can be extracted through drilling wells. 8. ………. coal is a black and dull coal. 9. ………. is used to make face packs and cosmetics. 10. Activated carbon used in filters for water and air purification and in …………. machines is obtained from coal. |
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Answer» 1. fertilizers 2. trees, plants 3. water 4. hydrogen sulphide 5. Propane 6. Butane 7. Conventional 8. Sub-bituminous 9. Activated charcoal 10. kidney dialysis |
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