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JAMB Chemistry 2012 Question 41

Question 41

Alkanals and Alkanones

Alkanals can be distinguished from alkanones by the reaction with

  1. A.sudan III stain
  2. B.starch iodide paper
  3. C.lithium tetrahydrido aluminate(III)
  4. D.Fehling's solution
Show the answer and explanation

Answer: D (Fehling's solution)

Explanation

Alkanals reduce Fehling's solution to a red precipitate; alkanones do not.