Question

46.
41. 'Fly ash' produced in thermal power plants
is an ecofriendly resource for use in:
(A) agriculture as micro-nutrient
(B) wasteland development
(C) dam and water holding structures
(D) brick industry
Choose the correct answer from the code
given below:
(a) (A), (B) and (D) only
(b) (B), (C) and (D) Only
(c) (A), (C) and (D) Only
(d) (A), (B), (C) and (D)
correct answer​

Answer 1

Answer:

option C is the correct answer

Answer 2

Answer:

'Fly ash' produced in thermal power plants is an eco-friendly resource used in agriculture as micro-nutrient, wasteland development, dam and water holding structures, and brick industry. (Option d)

Explanation:

• The combustion of coal and other materials for power generation leaves a by-product called fly ash.
• It is suspected to be composed of traces of alumina, various other toxic heavy metals, and carcinogenic elements.
• It can be used in agriculture as a micro-nutrient since it is a good insecticide, which is present in various chemical and herbal insecticides.
• It is also used in wasteland management, which supplies essential plant nutrients and maintains the quality of soil.
• It is also used in dams and water holding structures for the construction of ash dams. It is the main part of a thermal power plant.
• It is also used in brick industry as a building material that replaces clay bricks. Fly ash bricks are manufactured at room temperature, which are composed of ash, sand, and cement.