JAMB Chemistry 2011 Question 48

Question 48

Alkanals and Alkanones

Two organic compounds K and L were treated with a few drops of Fehling's solution respectively. K formed a brick-red precipitate while L remains unaffected. The compound K is an

  1. A.alkanol
  2. B.alkane
  3. C.alkanal
  4. D.alkanone
Show the answer and explanation

Answer: C (alkanal)

Explanation

Alkanals (aldehydes) reduce Fehling's solution to red Cu2O; alkanones do not.