Given below are the different temperature reactions & products during extraction of iron in blast furnace
| Set 1 | Set 2 |
| (1) 5000-8000 K | (p) Pig iron |
| (2) 12700 | (q) Molten slag |
| (3) 21700 | (r) C + O2 → 2CO |
| (4) 2170 | (*) 3Fe2 O3 +CO → 2Fe3O4 +CO2 |
| (5) > 21700 | (t) CaO + SiO2 → CaSiO3 |
(a) 1-*,2 q,3r,4-p
(b) 1-*,t ; 2-r,3-q ,4-p
(c) 1-r,* ;2-t,3-p,4-q
(d) 1-*,2-r,3-q,4-ps
