Chemistry - Metallurgy Question with Solution | TestHub
Consider the following extraction process and match List-I with List-II.
List - I | List - II |
|---|---|
(P) Magnetic separation | (1) Step-I |
(Q) Liquation | (2) Step-II |
(R) Poling | (3) Step-III |
(S) Carbon reduction | (4) Step-IV |
| (5) No any step |
The correct option is :
Options:
Answer:
Solution:
(P) Magnetic separation matches with (1) Step-I, because wolframite (FeWO₄ ⋅ MnWO₄) is magnetic and cassiterite (SnO₂) is non-magnetic, allowing them to be separated magnetically.
(Q) Liquation matches with (4) Step-IV, as tin has a low melting point compared to its impurities, allowing high purity metal to be obtained by melting it on an inclined furnace hearth.
(R) Polling matches with (3) Step-III, which removes the impurity of the metal oxide (MO₂) from the molten metal by stirring it with green logs of wood.
(S) Carbon reduction matches with (2) Step-II, where cassiterite (SnO₂) is reduced to metal (tin) using anthracite coal (carbon) in a blast or reverberatory furnace.
