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Q: Fly-ash is a by-product of:
  • A. pig iron
  • B. coal
  • C. gypsum
  • D. lime
Correct Answer: Option B - Fly ash:– It is a by-product of coal from electric and stream generating plants. • It consists of oxides of silicon. aluminum, iron calcium and sodium etc.
B. Fly ash:– It is a by-product of coal from electric and stream generating plants. • It consists of oxides of silicon. aluminum, iron calcium and sodium etc.

Explanations:

Fly ash:– It is a by-product of coal from electric and stream generating plants. • It consists of oxides of silicon. aluminum, iron calcium and sodium etc.