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10th Class Social Science Minerals and Energy Resources / खनिज और ऊर्जा संसाधन Question Bank 10th CBSE Social Science Minerals and Energy Resources

  • question_answer
      Coal is classified in various categories. Give account of it with per. cent of carbon contain?

    Answer:

                      Coal is classified in four categories (i) Peat < 50 % carbon (ii) Lignite  50 - 75% carbon (iii) Bituminous  75 -90% carbon (iv) Anthracite above 90% carbon


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