WAEC Chemistry 2012 Objective — Question 41
Question 41 of 50 from the West African Examinations Council (WAEC) Chemistry 2012 Objective paper, with the correct answer and a full explanation.
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Alkanals can be distinguished from alkanones by the reaction with
- A. sudan III stain
- B. starch iodide paper
- C. lithium tetrahydrido aluminate(III)
- D. Fehling's solutionCorrect
Explanation
Alkanals (aldehydes) give a positive test with Fehling's solution (forming a brick-red precipitate), while alkanones (ketones) do not.
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