Q. Which of the following compounds are present in the chemical composition of Fly Ash?
1. Aluminum silicate
2. Silicon dioxide
3. Calcium oxide
4. Sulfur oxide
Select the correct answer using the codes given below:
Answer: C
Notes:
Explanation: Fly ash, also known as pulverized fuel ash in the United Kingdom, is a coal combustion product composed of fine particles that are driven out of the boiler with the flue gases. Ash that falls in the bottom of the boiler is called bottom ash. In modern coal-fired power plants, fly ash is generally captured by electrostatic precipitators or other particle filtration equipment before the flue gases reach the chimneys.
Chemical Composition of fly ash:
- Aluminum silicate (enlarge amounts);
- Silicon dioxide (Si02); and
- Calcium oxide (Ca0).
Source: Shankar IAS
