Chemistry
Grade-8
Easy

Question

Coal is the mixture of carbon, hydrogen and:

  1. Nitrogen
  2. Calcites
  3. Free carbon compounds
  4. Silicates

hintHint:

Coal is composed mainly of carbon

The correct answer is: Free carbon compounds


    The correct option is c)Free carbon compounds.
    Coal is a mixture of two components: carbonaceous matter (decayed remains of prehistoric vegetation) and mineral matter (derived from the soil in which the coal was dug). Carbonaceous materials are composed of five major elements: carbon, hydrogen, oxygen, nitrogen and sulfur.

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