Question:
Phenols react with neutral ferric chloride, then which coloration is NOT produced?
Phenols react with neutral ferric chloride, then which coloration is NOT produced?
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The ferric chloride test gives violet, blue, green or red-type colours, but not black.
Updated On: Nov 12, 2026
- Purple
- violet
- green
- Black
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
Phenols form coloured iron(III) phenoxide complexes with neutral \(\text{FeCl}_3\), and this is the standard test for the phenolic OH group.
Step 2: Colours produced
Depending on the phenol, the colour is violet or purple (phenol itself), blue, green or red.
Step 3: Conclusion
A black colour is not produced in this test.
Final Answer:
Black is the colour not produced. \[ \boxed{\text{(D) }\text{Black}} \]
Phenols form coloured iron(III) phenoxide complexes with neutral \(\text{FeCl}_3\), and this is the standard test for the phenolic OH group.
Step 2: Colours produced
Depending on the phenol, the colour is violet or purple (phenol itself), blue, green or red.
Step 3: Conclusion
A black colour is not produced in this test.
Final Answer:
Black is the colour not produced. \[ \boxed{\text{(D) }\text{Black}} \]
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