Which of the following reaction is not shown by ketones?
Correct answer: D. reaction with Fehling
- A. reaction with HCN
- B. reaction with NaHSO4
- C. reaction with 2,4 dinitrophenyl hydrazine
- D. reaction with Fehling
Explanation
While ketones are versatile reagents involved in numerous reactions, they refuse to play nice with Fehling's solution. This blue-hued concoction readily oxidizes aldehydes to carboxylic acids, changing its own color and forming a red precipitate. But ketones, with their less reactive carbonyl groups, simply shrug off Fehling's advances, leaving the solution unchanged.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Practise Aldehydes and Ketones
679 free Aldehydes and Ketones MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.