Question:easy
What is the oxidation state of chromium in the final product when KI reacts with acidified potassium dichromate solution?
What is the oxidation state of chromium in the final product when KI reacts with acidified potassium dichromate solution?
Show Hint
Dichromate oxidises iodide to iodine and itself becomes Cr3+.
Updated On: Oct 1, 2026
- \(+2\)
- \(+3\)
- \(+6\)
- \(+4\)
Show Solution
The Correct Option is B
Solution and Explanation
Step 1: Electron balance
Each iodide gives 1 electron. Six iodides give 6 electrons to two Cr atoms, which is 3 electrons each.
Step 2: Result
$+6 - 3 = +3$. Option (B).
Final Answer:
+3. \[ \boxed{\text{(B)}\ +3} \]
Each iodide gives 1 electron. Six iodides give 6 electrons to two Cr atoms, which is 3 electrons each.
Step 2: Result
$+6 - 3 = +3$. Option (B).
Final Answer:
+3. \[ \boxed{\text{(B)}\ +3} \]
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