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Where is natural gas usually found ? Name the combustible gas present in natural gas.
Natural gas is found deep under the crust of earth either alone or alongwith oil above the petroleum deposits. Many oil wells produce natural gas as a by-product. There are however, some wells which produce only natural gas.
The combustible gas present in natural gas is methane.
Fossil fuels are ________, ________ and ________.
Process of separation of different constituents from petroleum is called __________.
Least polluting fuel for vehicle is ________.
Fossil fuels can be made in the laboratory.
CNG is more polluting fuel than petrol.
Coke is almost pure form of carbon.
Coal-tar is a mixture of various substances.
Kerosene is not a fossil fuel.
Explain why fossil fuels are exhaustible natural resources?
Describe characteristics and uses of coke.
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