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Consider the following:
1. Silicon dioxide (SiO2)
2. Calcium oxide (CaO)
3. Aluminium oxide (Al2O3)
How many of the above chemicals are primarily present in the fly ash?
  • a)
    Only one
  • b)
    Only two
  • c)
    All three
  • d)
    None
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Consider the following:1. Silicon dioxide (SiO2)2. Calcium oxide (CaO)...
Option (c) is correct
Fly Ash 
  • Fly ash is the fi nely divided residue that results from the combustion of pulverized coal and is transported from the combustion chamber by exhaust gases.
  • It is produced from the combustion of coal in electric utility or industrial boilers, produced by coal-fi red electric and steam generating plants.
  • It consists primarily of oxides of silicon, aluminium, iron, and calcium.
  • Magnesium, potassium, sodium, titanium, and sulphur are also present to a lesser degree.
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Most Upvoted Answer
Consider the following:1. Silicon dioxide (SiO2)2. Calcium oxide (CaO)...
Presence of Chemicals in Fly Ash:
Fly ash is a byproduct of coal combustion and contains various chemical compounds. Let us analyze the presence of the given chemicals in fly ash:

1. Silicon dioxide (SiO2):
- Silicon dioxide is a common component of fly ash.
- It is present in fly ash due to the silica content in coal.

2. Calcium oxide (CaO):
- Calcium oxide is also found in fly ash.
- It originates from the calcium compounds present in coal.

3. Aluminium oxide (Al2O3):
- Aluminium oxide is another chemical that is primarily present in fly ash.
- It comes from the aluminium compounds present in coal.

Conclusion:
- All three chemicals, namely silicon dioxide, calcium oxide, and aluminium oxide, are primarily present in fly ash.
- Therefore, the correct answer is option 'C' - All three chemicals are found in fly ash.
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Consider the following:1. Silicon dioxide (SiO2)2. Calcium oxide (CaO)3. Aluminium oxide (Al2O3)How many of the above chemicals are primarily present in the fly ash?a)Only oneb)Only twoc)All threed)NoneCorrect answer is option 'C'. Can you explain this answer?
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