Which of the following reacts with Tollen's reagent but does not form silver mirror:
Correct answer: B. Acetylene
- A. Acetaldehyde
- B. Acetylene
- C. Formic acid
- D. Formaldehyde
Explanation
We know that acetylene reacts with ammoniacal AgNO3 and the reaction is known as Tollens's Test. In the following Tollens test, we get a white precipitate. Elementary silver will be displaced from the ammoniacal silver nitrate and will form white precipitate in reacting vessel.
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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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