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ACROSS4.Also known as crude oil5. Used for surfacing of roads6.The slow process of conversion of dead vegetation into coalDOWN1.It is also known as black lignite2. A hydrocarbon made up of carbon and hydrogen and has a chemical formula CH,3.Thick black-liquid obtained from destructive distillation of coal. |
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Answer» 1) petroleum 5) BITUMEN 6) carbonizatiob
down 1) subbituminous coal 2) METHAN 3) coal tar |
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