Question

Differentiate between coal and coke.

Answer 1

Coal	Coke
1. Coal is a naturally occurring fuel that comes from incomplete burning of wood.	1. Coke is the derivative product. It can be prepared from coal itself by heating soft coal in absence of air and subsequently adding some impurities to it.
2. It is mostly composed of carbon.	2. It is mostly composed of water.
3. It has volatile matter, hence not considered as a good fuel.	3. It contains low volatile matter, hence is preferred over coal.
4. It has low calorific value than coke, hence not a good fuel.	4. It has high calorific value because it produces more heat on burning as compared to coal.
5. It's appears like a solid mass.	5. It has a hard, highly porous structure.