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Q. a. What is the origin of fossil fuels? b. List three fossil fuels. c. Are fossil fuels a renewable resource?
Answer:
a. Coal, natural gas and oil. b. Fossil fuels originated 150-300 million years ago from animal and plant matter. c. No. The time needed to form these fuels means they are not renewable.
What would be the benefit of knowing where the electrons are at any time?
The frequency of yellow light having wavelength 600 nm is: (1) 5.0x10 14 Hz (2) 2.5 x 10 7 Hz (3) 5.0x 10 7 Hz
Physical properties of Phenol (a) Phenol is a colorless crystalline, deliquescent solid. It attains pink colour on exposure to air and light. (b) Phenol is capable of formin
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