Coke is a high-carbon product obtained by the destructive distillation of coal. Coke is greyish-black in colour and is a hard, porous solid. Coal tar is obtained as a by-product in the process of making coke. The colour is the same as coke and is a highly viscous liquid.
Further Reading:
- NCERT Notes: Geography- Some major minerals and their characteristics
- NCERT Notes: Geography-Physical characteristics of minerals
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