Limestone is added in the blast furnace (during pig iron manufacture) to______________________?

(A) Form slag by combining with impurities ()
(B) Supply heat by undergoing exothermic reaction with impurities (X)
(C) Reduce the coke h (X)
(D) Reduce slag viscosity (X)

Answers: Limestone is added in the blast furnace (during pig iron manufacture) Form slag by combining with impurities.