21. In "Imperial Smelting Process" for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following:
22. Identify the correct combination of the following statements.
P. Bessemer converter can be used in copper smelting.
Q. The Mond process for nickel involves reaction of metal with H2 gas.
R. Roasted ZnS concentrates can be smelted in a blast furnace.
S. Magnesium metal can be produced by electrolysis of sea water.
P. Bessemer converter can be used in copper smelting.
Q. The Mond process for nickel involves reaction of metal with H2 gas.
R. Roasted ZnS concentrates can be smelted in a blast furnace.
S. Magnesium metal can be produced by electrolysis of sea water.
23. Which elements may be detected by magnetic methods?
24. Ores of Tin are
25. What are the uses of copper
26. Match the metal in Group 1 with the corresponding ores in Group 2.
Group 1
Group 2
P. Lead
1. Columbite
Q. Zinc
2. Cassiterite
R. Uranium
3. Galena
S. Niobium
4. Pitchblende
5. Sphalerite
| Group 1 | Group 2 |
| P. Lead | 1. Columbite |
| Q. Zinc | 2. Cassiterite |
| R. Uranium | 3. Galena |
| S. Niobium | 4. Pitchblende |
| 5. Sphalerite |
27. In Zinc recovery system, the zinc containing lead pumped from condensed at a temperature (°C)
28. Cassiterite is an important source for
29. Match the metallurgical processes in Group 1 with their corresponding reactors type in Group 2.
Group 1
Group 2
P. Roasting of sulfide concentrate
1. Pneumatic reactor
Q. L.D. steel making
2. Retort
R. Dwight-Lloyd sintering
3. Travelling grate reactor
S. Zinc extrrction
4. Fluidised bed reactor
| Group 1 | Group 2 |
| P. Roasting of sulfide concentrate | 1. Pneumatic reactor |
| Q. L.D. steel making | 2. Retort |
| R. Dwight-Lloyd sintering | 3. Travelling grate reactor |
| S. Zinc extrrction | 4. Fluidised bed reactor |