Question

write some characteristic properties of coal
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Answer 1

Answer:

Density. Knowledge of the physical properties of coal is important in coal preparation and utilization. For example,...

Porosity. Coal density is controlled in part by the presence of pores that persist throughout coalification. Measurement...

Reflectivity. An important property of coal is its reflectivity (or reflectance )—i.e., its ability to reflect light.

Other properties. Other properties, such as hardness, grindability, ash-fusion temperature, and free-swelling index

and Coals have many structural features such as aromaticity, various oxygen, nitrogen, and sulfur functional groups, covalent and noncovalent cross-links, physical associations, and several surface structural features that determine physical properties and reactivities.

Explanation:

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Answer 2

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Chemical properties of coal

• Moisture. Moisture is an important property of coal, as all coals are mined wet.
• Volatile matter.
• Ash.
• Fixed carbon.
• Relative density.
• Particle size distribution.
• Float-sink test.
• Abrasion testing.

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