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 ? (At.wt of In = 114.81)
A
3
B
2
C
5
D
1
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The correct Answer is:
A
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