Neutral FeCl3 reacts with phenol to give a characteristic coloured solution, due to the formation of complex iron metal ion with phenoxide.
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Acidic and basic FeCl3 do not give positive test with phenol because, if the FeCl3 reacts with acid and forms salt, if the FeCl3 reacts with base a precipitate of the salt will be formed.That is the reason why we should use only neutral ferric chloride.
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Phenol reacts with neutral FeCl3 solution to give violet colour complex which is soluble in water.
Look into functional identification tests for phenol with neutral ferric chloride.
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\n"},"eduQuestionType":"Multiple choice","encodingFormat":"text/markdown","learningResourceType":"Practice problem","suggestedAnswer":[{"@type":"Answer","comment":{"@type":"Comment","text":"It is a wrong option."},"encodingFormat":"text/html","position":0,"text":"Nitrophenol"},{"@type":"Answer","comment":{"@type":"Comment","text":"It is a wrong option."},"encodingFormat":"text/html","position":1,"text":"Phenol"},{"@type":"Answer","comment":{"@type":"Comment","text":"It is a wrong option."},"encodingFormat":"text/html","position":3,"text":"-cresol"}],"text":"Which of the following will not give positive test with neutral "},"name":"Quiz on Alcohols, Phenols and Ethers","typicalAgeRange":"10-17","url":"https://www.embibe.com/questions/Which-of-the-following-will-not-give-positive-test-with-neutral-FeCl3%3F/EM8834362"}
Embibe Experts Solutions for Exercise 3: Assignment
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Embibe Experts Chemistry Solutions for Exercise - Embibe Experts Solutions for Exercise 3: Assignment
Attempt the free practice questions from Exercise 3: Assignment with hints and solutions to strengthen your understanding. Gamma Question Bank for Medical Chemistry solutions are prepared by Experienced Embibe Experts.
Questions from Embibe Experts Solutions for Exercise 3: Assignment with Hints & Solutions