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Answer to Question #116021 in Organic Chemistry for Jaweria Rana

Question #116021
Which of the following show positive test with Fehling solution why? Explain.
1) Farnesal
2) Pulegone
3) Citronellal
4) Beta-Ionone
1
Expert's answer
2020-05-15T10:22:30-0400

Fehling's reagent is used to detect aliphatic aldehydes:


R-CHO + 2Cu2+ + 4OH- = R-COOH + Cu2O + 2H2O


In view of this, a positive reaction will give 1) Farnesal and 3) Citronellal, because they contain an aldehyde group.


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