The following reaction take place in the blast in the proparation of impure iron identify the reaction pertatining to the formetion of the slag

Options

A. `Fe_2 O_3 (s)+3 CO(g) to 2 Fe (1) + 3 CO_2 (g)`
B. `CaCO_3 (s)to CaO (s) + CO_2 (g)`
C. `CaO (s) + SiO_2 (s ) CaSiO_3(s)`
D. `2C(s) + O_2(g) to 2 CO(g)`

Answer

C

Explanation

In blast furnace at about 1270 K, calcium carbonate is almost completely decomposed to give CaO which acts as a flux and combines with `SiO_2` present as impurity (gangue) in the ore to form calcium silicate (fusible slag)
` underset( "( basic flux ) ( acidic flux ) ( slag )") ( Ca O (s) + SiO_2(s) to CaSiO_3 (s))`