The element indium is to be obtained by electrolysis of a molten halide of the element. Passage of a current of 3.20 A for a period of 40.0 min results in formation of 3.05 g of In. What is the oxidation state of indium in the halide melt

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answer is A.

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Detailed Solution

3.05=114.8n×3.2×40×6096,500∴n=3

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