11. The exit gases of blast furnace contains . . . . . . . . % carbon-monoxide, when equilibrium is achieved.
12. Group I is a list of technologies for alternate methods of producing iron. Group II is a list of terms you come across in the context of these technologies. Match the items.
Group I
Group II
P. MIDREX
1. Retort
Q. COREX
2. Rotary kiln
R. SL/RN
3. Smelting reduction
S. HyI- I
4. Shaft furnace
| Group I | Group II |
| P. MIDREX | 1. Retort |
| Q. COREX | 2. Rotary kiln |
| R. SL/RN | 3. Smelting reduction |
| S. HyI- I | 4. Shaft furnace |
13. In the blast furnace, as the oxygen percentage in air blast increases, the
P. flame temperature increases
Q. blast volume increases
R. blast volume decreases
S. flame temperature decreases
P. flame temperature increases
Q. blast volume increases
R. blast volume decreases
S. flame temperature decreases