Question : Which of the following is a tough, porous, black substance and an almost pure form of carbon?
Option 1: Coke
Option 2: Bitumen
Option 3: Coal tar
Option 4: Coal gas
Correct Answer: Coke
Solution : The correct answer is Coke .
Coke is a grey, robust, and porous fuel primarily produced through the destructive distillation of low-ash, low-sulphur bituminous coal. This industrial product is crucial in iron ore smelting and serves as a clean-burning fuel in stoves and forges, where air pollution is a concern.
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