Section E: Answer the case-based question given below.
37. Metals are required for a variety of purposes. For this we need their extraction from their ores. Ores mined from the earth are usually contaminated with many impurities which must be removed prior to the extraction of metals. The extraction of pure metal involves the following steps:
1. Concentration of ore
2. Extraction of the metal from the concentrated ore
3. Refining of the metal
2. Extraction of the metal from the concentrated ore
3. Refining of the metal
c. The reaction of a metal A with \(Fe_2O_3\) is highly exothermic and is used to join railway tracks.
I. Identify the metal A and name the reaction taking place.
II. Write the chemical equation for the reaction of metal A with \(Fe_2O_3\).
II. Write the chemical equation for the reaction of metal A with \(Fe_2O_3\).
c. Reaction of metal \(A\) with \(Fe_2O_3\):
I. Identification of metal \(A\) and reaction:
The metal A that reacts with \(Fe_2O_3\) in a highly exothermic reaction is . The reaction taking place is known as the reaction.
II. Chemical equation for the reaction:
The chemical equation for the thermite reaction is: \(2Al\) + \(Fe_2O_3\) → \(2Fe\) + \(Al_2O_3\)
This reaction is used to join railway tracks due to its highly nature, which produces molten iron that can be used to weld the tracks together.