6. a) A fossil fuel is obtained from marine organisms. Explain its formation. b) Why in petroleum deposits, the layer of petroleum oil is above the layer of water? The mixture of hydrocarbons in petroleum is separated into different fractions. (3) Given below are the names of some fractions and their uses/applications in daily life. Write down the correct pairs. Diesel fraction, Bitumen, Petrol fraction, Lubricating fraction, Paraffin fraction, Kerosene. Domestic fuel, road surfaces,candles, electric generators , LPG,lubricating machinery
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1density of the petroleum is low in compared to water and things with low density flow above the things of high density.
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