4. The material A is a fossil fuel which is extracted from the earth. It is said to be formed from the buried large land plants by a very slow process B. When A is heated in the absence of air in a process C, then it gives three products D, E and F. The product D is used as a reducing agent in the extraction of metals, the product E is used as an industrial fuel whereas the product F has been traditionally used for metalling the roads. a. What could material A be? b. What is (i) physical state, and (ii) colour of A? c. Name the processes (i) B, and (ii) C d. What are (i) D, (ii) E, and (iii) F?
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Answer:
●. A IS COAL OF COLOUR BLACK
●C IS THE NAME OF PROCESS IS DESTRUCTIVE DISTILLATION.
●B IS PROCESS BY WHICH PLANTS BURIED UNDER HIGH PRESSURE AND HIGH TEMPERATURE FORM
FOSSIL FUELS.
●D IS CARBON USED AS REDUCING AGENT.
●E IS USED AS NATURAL GAS.
●F IS ASPHALT USED FOR METALLING THE ROADS.
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