1. Write the names of two natural substances.
2. What is the purest form of carbon?
3. What is the main use of coke?
4. Name two fractions of petroleum>
5. Why petroleum is called black gold?
6. Expand PCRA.
7. What are natural resources? Explain with examples.
8. What are fossil fuels? Name main fossil fuel.
9. What is coal tar? What are its uses?
10. Why CNG is called clean fuel?
11. State some harmful effects of using fossil fuels?
12. What are petrochemicals?
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1.plants,metals
2.diamond
3.it is used as a fuel and reducing agent as well,it is helpful in the purification of alumina as well.
4.
2.diamond
3.it is used as a fuel and reducing agent as well,it is helpful in the purification of alumina as well.
4.
Aloof5:
thankku
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10 .One reason natural gas is called “clean” is because it emits 50 percent less carbon dioxide than coal when you burn it. Thus it's seen by some as a “bridge” fuel until zero-carbon-producing renewables can take over. But natural gas isn't clean in the way that solar is clean. It's clean-er than coal.
11.Comparing energy sources in terms of their global warming pollution. Of the many environmental and public health risks associated with burning fossil fuels, the most serious in terms of its universal and potentially irreversible consequences is global warming.
12.Petrochemicals, also called petroleum distillates, are chemical products derived from petroleum. Some chemical compounds made from petroleum are also obtained from other fossil fuels, such as coal or natural gas, or renewable sources such as corn or sugar cane.
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