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When thiosulfate is oxidized by iodine, the product formed is:

1. tetrathionate ion
2. sulfide ion
3. sulfate ion
4. sulfite ion

Correct answer: tetrathionate ion

Solution

When thiosulfate is oxidized by iodine, it undergoes a reaction that leads to the formation of tetrathionate ion, as the oxidation process involves the combination of two thiosulfate ions.

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