Question:
From the compounds given below, the number of compounds which give a positive Fehling’s test is____.
Compounds: Benzaldehyde, Acetaldehyde, Acetone, Acetophenone, Methanal, 4-nitrobenzaldehyde, cyclohexane carbaldehyde.
From the compounds given below, the number of compounds which give a positive Fehling’s test is____.
Compounds: Benzaldehyde, Acetaldehyde, Acetone, Acetophenone, Methanal, 4-nitrobenzaldehyde, cyclohexane carbaldehyde.
Compounds: Benzaldehyde, Acetaldehyde, Acetone, Acetophenone, Methanal, 4-nitrobenzaldehyde, cyclohexane carbaldehyde.
Updated On: July 22, 2025
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Correct Answer: 3
Solution and Explanation
Fehling’s test is positive for compounds with an aldehyde group (except for aromatic aldehydes) or alpha-hydroxy ketones.
The compounds that give a positive Fehling’s test are:
- Acetaldehyde (CH3CHO)
- Methanal (HCHO)
- Cyclohexane carbaldehyde
Other compounds, such as benzaldehyde, acetophenone, and 4-nitrobenzaldehyde, do not give a positive Fehling’s test because they are aromatic aldehydes or ketones.
Thus, the correct count is:
So, the correct answer is: 3
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