Which compound gives red colour with Fehling's solution?

Answer:

Glucose gives red colour in Fehling’s test.

Fehling’s test

  • Fehling’s reagent, a blue-colored basic bistartratocuprate(II) complex solution, is mixed with three different aqueous sugar solutions in warm water beakers.
  • In the presence of glucose and fructose, a brick-red precipitate develops.
  • In the test tube containing sucrose solution, there is no response.

Uses of Fehling’s Test

  • It is used to determine whether a carbonyl group is an aldehyde or a ketone. Aldehydes tend to get oxidized and give a positive result. Ketones apart from alpha-hydroxy-ketones do not react.
  • Fehling’s test is also used as a general test for monosaccharides where a positive result is obtained for aldose monosaccharides and ketose monosaccharides.
  • It is also used in the medical field to determine the presence of glucose in urine. It helps to know whether the person is diabetic or not.

Was this answer helpful?

 
   

0.5 (1)

(0)
(1)

Choose An Option That Best Describes Your Problem

Thank you. Your Feedback will Help us Serve you better.

Leave a Comment

Your Mobile number and Email id will not be published. Required fields are marked *

*

*

BOOK

Free Class

Ask
Question