JAMB Chemistry 2011 Objective — Question 47
Question 47 of 49 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2011 Objective paper, with the correct answer and a full explanation.
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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
- A. A. alkanone
- B. B. alkanol
- C. C. alkane
- D. D. alkanalCorrect
Explanation
Fehling's solution distinguishes alkanals (aldehydes) from alkanones (ketones). Alkanals produce a red precipitate with Fehling's solution (they have an oxidizable hydrogen atom, R-CHO) while alkanones do not (R-CO-R).
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