Chemistry
Grade-10
Easy
Question
An aqueous solution of potassium iodide turns from colorless to brown. What happens to the iodide ions?
- Iodide ions are oxidized due to gain of electrons.
- Iodide ions are oxidized due to loss of electrons.
- Iodide ions are reduced due to loss of electrons.
- Iodide ions are reduced due to gain of electrons.
Hint:
Iodide ions are oxidized to iodine.
The correct answer is: Iodide ions are oxidized due to loss of electrons.
An aqueous solution of potassium iodide turns from colorless to brown.
When chlorine gas is bubbled into an aqueous solution of potassium iodide, some of the iodide ions are oxidized to iodine. The iodine molecules combine with iodide ions to form brown triiodide ion, I3-.
Iodide ions are oxidized due to loss of electrons.
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