The exhaled breath of diabetics contains propanone. A medical student wishes to test for diabetes by asking patients to bubble their breath through a reagent. Which reagent could give a positive result?
Correct answer: A. Alkaline aqueous iodine
- A. Alkaline aqueous iodine
- B. Aqueous bromine
- C. Fehiling's reagent
- D. Tollen's reagent
Explanation
The correct option for the reagent that could give a positive result when testing the exhaled breath of diabetics containing propanone for diabetes is A) Alkaline aqueous iodine. Propanone (acetone) reacts with alkaline aqueous iodine to form a yellow precipitate called iodoform, indicating the presence of a ketone. This test can help in the detection of diabetes in patients.
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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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