Question:
Acidified potassium dichromate cannot oxidize ________.
Acidified potassium dichromate cannot oxidize ________.
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Nothing can chemically oxidize Fluoride because Fluorine is the ultimate oxidizing agent.
Updated On: Jun 26, 2026
- Iodides to iodine
- Iron (II) salt to iron (III) salt
- Tin (II) salt to tin (IV) salt
- $H_{2}S$ to sulphur
- Fluoride to fluorine
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The Correct Option is
Solution and Explanation
Step 1: Concept
Potassium dichromate ($K_2Cr_2O_7$) is a strong oxidizing agent in acidic medium.
Step 2: Meaning
An oxidizing agent can only oxidize species that have a lower reduction potential than itself.
Step 3: Analysis
Fluorine has the highest reduction potential ($+2.87V$), which is much higher than dichromate ($+1.33V$).
Step 4: Conclusion
Thus, dichromate cannot oxidize fluoride ions to fluorine gas. Final Answer: (E)
Potassium dichromate ($K_2Cr_2O_7$) is a strong oxidizing agent in acidic medium.
Step 2: Meaning
An oxidizing agent can only oxidize species that have a lower reduction potential than itself.
Step 3: Analysis
Fluorine has the highest reduction potential ($+2.87V$), which is much higher than dichromate ($+1.33V$).
Step 4: Conclusion
Thus, dichromate cannot oxidize fluoride ions to fluorine gas. Final Answer: (E)
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