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Coal and Petroleum — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceCoal and Petroleum1 Mark
MCQ
What is the source of fly ash$?$
  • A
    Petroleum
  • B
    Natural gas
  • ✓
    Coal
  • D
    All of the above
✓

Answer

Correct option: C.
Coal

Fly ash is a fine powder formed when large amount of coal is burnt in sufficient quantity of air in places like thermal power stations etc. The ash is carried by atmospheric air due to strong current of air in the furnace, Hence, this ash is called fly ash. It causes respiratory problems when inhaled by man.

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