The chemical composition of basic slag is

A. Ca₃(PO₄)₂

B. (CaO)₃P₂O₅, SiO₂

C. (CaO)₂P₂O₅, SiO₂

D. (CaO)₃P₂O₄, SiO₄

Answer: Option B

Solution(By Examveda Team)

The chemical composition of basic slag is (CaO)₃P₂O₅, SiO₂.
Slag is a by-product of smelting (pyrometallurgical) ores and used metals.
Basic slag systems are made up primarily of limestone, particularly calcium carbonate (CaCO₃), which helps provide good impact properties at low temperatures.
Basic slag is low in silica and high in base-forming oxides that are used in the basic process of steelmaking and that are subsequently useful as a fertilizer.