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InterviewSolution
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With reference to the position of various metals in the electrochemical series, identify and justify the method of extraction followed for the metals given below : (i) Zinc (ii) Copper (iii) Magnesium |
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Answer» (i) Zinc is a metal present in the middle of the electrohemical series. Zinc has negative SRP value that is why it can be reduced by normal reducing agents such as hydrogen, carbon monoxide and carbon. This is because these reducing agents possess the ability to break ionic bonds between metal ion and oxide ion. (ii) Copper is a metal present above hydrogen in the electrochemical series. It has positive value for SRP that indicates the lesser thermal stability of its oxide. Thus, it can be extracted by reduction with other metals that have lower SRP than Cu. (iii) Magnesium is a metal present at the bottom in the electrochemical series. It has very high value of negative SRP value. That means, it itself is a strong reducing agent and hence, cannot be reduced by any other reducing agents. It is therefore extracted by the electrolytic reduction of its molten salt |
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