Aldehydes And Ketones
Fehling's solution is reduced by:
Select the correct option:
Solution
Aldehydes only
Fehling's Solution (a mixture of Copper sulfate and alkaline Sodium potassium tartrate) is a mild oxidizing agent.
- Aliphatic Aldehydes: Readily reduce the deep blue Cu2+ complex to a reddish-brown precipitate of Cuprous oxide (Cu2O).
- Ketones: Generally do not react because they lack the necessary H atom attached to the carbonyl carbon for easy oxidation.
- Aromatic Aldehydes (e.g., Benzaldehyde) are also a classic exception and do not reduce Fehling's solution, making it a useful test to distinguish them from aliphatic ones.
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About This Question
- Subject
- chemistry
- Chapter
- organic compounds containing oxygen
- Topic
- aldehydes and ketones
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Aldehydes only
Fehling's Solution (a mixture of Copper sulfate and alkaline Sodium potassium tartrate) is a mild oxidizing agent.
- Aliphatic Aldehydes: Readily reduce the deep blue Cu2+ complex to a reddish-brown precipitate of Cuprous oxide (Cu2O).
- Ketones: Generally do not react because they lack the necessary H atom attached to the carbonyl carbon for easy oxidation.
- Aromatic Aldehydes (e.g., Benzaldehyde) are also a classic exception and do not reduce Fehling's solution, making it a useful test to distinguish them from aliphatic ones.
This easy difficulty chemistry question is from the chapter organic compounds containing oxygen, covering the topic of aldehydes and ketones. It appeared in the 2025 exam.
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