On heating glucose with Fehling’s solution we get a precipitate whose colour is
(a) yellow
(b) red
(c) black
(d) white
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Answer: The correct answer is (B) Red.
Explanation:
Fehling's test is used in case of reducing sugars to detect the presence of aldehydes though it is not specific for any particular aldehyde.
The red precipitate is formed due to the production of the insoluble red coloured copper oxide by reduction of the blue coloured solution of Cu(II) (Fehling's reagent).
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