Fluorogypsum, used in super sulphated cement or as binding agents, is a waste product of manufacture of:(a) Fluorine(b) Thermal power(c) Hydrofluoric acid(d) Phosphoric acidThe question was posed to me during an internship interview.My query is from Cost Effective Materials in division Materials for Construction of Basic Civil Engineering

Fluorogypsum, used in super sulphated cement or as binding agents, is

1.	Fluorogypsum, used in super sulphated cement or as binding agents, is a waste product of manufacture of:(a) Fluorine(b) Thermal power(c) Hydrofluoric acid(d) Phosphoric acidThe question was posed to me during an internship interview.My query is from Cost Effective Materials in division Materials for Construction of Basic Civil Engineering
Answer» Correct OPTION is (c) Hydrofluoric acid Explanation: Phosphogypsum is a waste PRODUCT of Phosphoric acid manufacture and flyash is of thermal power plants.Fluorogypsum is purified by neutralising its ACIDITY and then can be USED for bricks, tiles, plastering, ETC.

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