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Chemistry in Everyday Life. — Science STD 8 — Question

Tamilnadu BoardEnglish MediumSTD 8ScienceChemistry in Everyday Life.2 Marks
Question
Anthracite is known as the highest-grade coal. Give reason.
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Answer

  1. Anthracite is the highest grade coal.
  2. It has a very light weight and the highest heat content.
  3. Anthracite coal is very hard, deep blacks, and shiny.
  4. It contains 86-97% carbon and has a heating value slightly higher than bituminous coal.
  5. It bums longer with more heat and less dust.

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