Which of the following will form brick red ppt. (Cu2O) with Benedict's solution:
Correct answer: A. O || CH3 - C- H
- A. O || CH3 - C- H
- B. O || CH3 - C- CH3
- C. O || CH3 - C- OH
- D. O || CH3 - C- CH2 - CH
Explanation
Benedict's Solution Test |an alkaline solution containing a cupriccitrate complex ion]: Aliphatic aldehydes form a brick-red precipitatewith Benedicts's solution. To an aldehyde solution, add Benedict'ssolution and boil. A brick-red precipitate of cuprous oxide is formed
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About Aldehydes and Ketones
Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
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