Question:
For extraction of highly reactive metal compounds from their ores, some impurities are added during the electrolysis process. The role of impurity is
For extraction of highly reactive metal compounds from their ores, some impurities are added during the electrolysis process. The role of impurity is
Updated On: Apr 7, 2025
- to give color to the ore
- to increase the melting point of ore
- to increase weight of ore
- to decrease the melting point of ore
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The Correct Option is D
Solution and Explanation
In the extraction of highly reactive metals like aluminum or sodium, electrolysis is used. To make the process efficient and less energy-consuming, impurities such as cryolite (in the case of aluminum extraction) are added. These impurities help by lowering the melting point of the ore, thus:
- Reducing the energy required for electrolysis
- Making the process more economical and feasible
Hence, the correct purpose of adding impurity is to decrease the melting point of the ore.
The correct option is (D): to decrease the melting point of ore
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