Chemistry
Grade-8
Easy
Question
Coal is the mixture of carbon, hydrogen and:
- Nitrogen
- Calcites
- Free carbon compounds
- Silicates
Hint:
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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