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Question 910008
JEE Chemistry · Medium

Practical Organic Chemistry: Mixed MCQ

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MixedMediumQuestion 910008

Question

The Fehling's solution test is positive for:
  1. A
    Glucose (reducing sugar) and aliphatic aldehydes
    Correct
  2. B
    Acetone (methyl ketone)
  3. C
    Benzoic acid
  4. D
    Sucrose (non-reducing sugar)

Correct answer

Glucose (reducing sugar) and aliphatic aldehydes

Explanation

Fehling's (Cu²⁺ alkaline tartrate) → reduced to Cu₂O (brick-red) by: (1) reducing sugars (glucose, fructose, maltose), (2) aliphatic aldehydes. NOT by: aromatic aldehydes (PhCHO), ketones, sucrose (non-reducing).

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