The correct answer is \( \text{HCOOH} \).
Tollen's reagent, also known as diamminesilver(I) hydroxide or ammoniacal silver nitrate, is a chemical compound with the formula \( \left[ \text{Ag(NH}_3\right)_2\text{OH} \). It is a light-yellow solution that is prepared by adding ammonia to a solution of silver nitrate.
Tollen's reagent is a mild oxidizing agent that can be used to oxidize aldehydes to carboxylic acids. In the presence of ammonia, Tollen's reagent selectively oxidizes aldehydes to carboxylic acids, while ketones remain unchanged.
The reaction between Tollen's reagent and an aldehyde can be represented by the following equation:
\[ \text{RCHO} + \left[ \text{Ag(NH}_3\right)_2\text{OH} \rightarrow \text{RCOOH} + \text{Ag} + \text{NH}_3 + \text{H}_2\text{O} \]
In this equation, \( \text{R} \) represents an alkyl or aryl group.
The other options are not correct because they are not aldehydes.
\[ \text{CH}_3\text{CH}_2\text{OH} \text{ is an alcohol.} \]
\[ \text{CH}_3\text{OCH}_3 \text{ is an ether.} \]
\[ \text{CH}_3\text{COCH}_3 \text{ is a ketone.} \]
Therefore, the only compound that can react with Tollen's reagent to form silver is \( \text{HCO OH} \). |
