Which of the following elements are manufactured by electrolytic extraction?
Which of the following elements are manufactured by electrolytic extraction?
The correct options are
A Alkaline earth metals - Calcium and Magnesium
B Alkali metals - Potassium and Sodium
C Aluminum
D Chlorine
Highly reactive metals like Sodium and Magnesium are extracted by electrolyzing their fused salts. Here aqueous solutions cannot be used as these metals will react with the electrolyte. To extract Magnesium, fused MgCl2 is electrolyzed. Sodium is extracted by means of the down’s process (which you have studied earlier), in which molten NaCl is electrolyzed in a special electrolytic cell called the down’s cell.
In the Hall–Héroult process, Aluminum is extracted by the fused electrolysis of a mixture of Al2O3 +Na3AlF6 +CaF2. Aqueous solutions cannot be used as the Hydronium ions can easily oxidize metallic Aluminum.
In the Chlor-Alkali process, Sodium Chloride is electrolyzed to produce Chlorine gas. This process also yields NaOH, which is a very important byproduct. In fact the process is carried out with the sole purpose to extract NaOH these days.
A
Alkaline earth metals - Calcium and Magnesium
B
Alkali metals - Potassium and Sodium
C
Aluminum
D
Chlorine
Highly reactive metals like Sodium and Magnesium are extracted by electrolyzing their fused salts. Here aqueous solutions cannot be used as these metals will react with the electrolyte. To extract Magnesium, fused MgCl2 is electrolyzed. Sodium is extracted by means of the down’s process (which you have studied earlier), in which molten NaCl is electrolyzed in a special electrolytic cell called the down’s cell.
In the Hall–Héroult process, Aluminum is extracted by the fused electrolysis of a mixture of Al2O3 +Na3AlF6 +CaF2. Aqueous solutions cannot be used as the Hydronium ions can easily oxidize metallic Aluminum.
In the Chlor-Alkali process, Sodium Chloride is electrolyzed to produce Chlorine gas. This process also yields NaOH, which is a very important byproduct. In fact the process is carried out with the sole purpose to extract NaOH these days.
