Fehling's Test: Which food samples contain reducing sugars? | Try Virtual Lab
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Fehling's Test: Which food samples contain reducing sugars? | Try Virtual Lab
Learn how to perform Fehling’s test for reducing sugars on a variety of food samples. Predict which samples contain reducing sugars and find out how your predictions compare to your results!
Jan 11, 2022
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Answers: Fehling’s test is given by aliphatic aldehydes, but benzaldehyde is an aromatic aldehyde. In benzaldehyde, the –CHO group is directly attached to the benzene ring. The benzene ring stabilizes the molecule by resonance, making the aldehyde group less reactive. (Draw Resonance structures also if question carries more marks) Benzaldehyde does not get easily oxidized by Fehling’s solution. Hence, no red precipitate of Cu₂O is formed. …continued in comments 🎀 12th organic chemistry importan
Answers: Fehling’s test is given by aliphatic aldehydes, but benzaldehyde is an aromatic aldehyde. In benzaldehyde, the –CHO group is directly attached to the benzene ring. The benzene ring stabilizes the molecule by resonance, making the aldehyde group less reactive. (Draw Resonance structures also if question carries more marks) Benzaldehyde does not get easily oxidized by Fehling’s solution. Hence, no red precipitate of Cu₂O is formed. …continued in comments 🎀 12th organic chemistry importan
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Fehling’s Test Explained in 30 Seconds | Detect Reducing Sugars Instantly Ever wondered why Fehling’s solution turns from blue to brick-red? 😲 This 30-second short explains how Fehling’s Reagent detects reducing sugars — a key topic in NEET & JEE Chemistry! Fehling’s test helps identify reducing sugars like glucose and fructose, forming a red cuprous oxide (Cu₂O) precipitate. A simple visual way to understand oxidation-reduction reactions — often asked in NEET, JEE, and board exams. 📌𝐓𝐨 𝐤𝐧
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