Question

The products formed in the following reaction, A and B, are: 

• A.

  

• B.

  

• C.

  

• D.

  

Hint:

Tollens' reagent oxidizes aldehydes to carboxylic acids, while sodium borohydride reduces ketones and aldehydes to alcohols.

Answer 1

The Correct Option is C

The reaction occurs in two distinct phases:

Phase 1: Oxidation Utilizing Tollens' Reagent

• Tollens' reagent, comprising \([Ag(NH_3)_2]^+ \) and \( OH^- \), specifically oxidizes aldehydes to carboxylic acids.
• Within this reaction, the aldehyde moiety (\(-CHO\)) of the substance is oxidized, yielding a carboxylic acid group (\(-COOH\)).
• The resultant compound, designated as \( A \), following oxidation, is: \[ \text{A} = \text{Substance featuring an aldehyde group oxidized to a carboxylic acid: } \text{HCOOH}. \]

Phase 2: Reduction Employing Sodium Borohydride

• Sodium borohydride (\( NaBH_4 \)) acts as a selective reducing agent, converting aldehydes and ketones into their respective alcohols.
• In the specific compound provided, the ketone functional group (\(-C=O\)) is reduced to a secondary alcohol (\(-CH(OH)-\)).
• The resulting compound, labeled \( B \), after reduction is: \[ \text{B} = \text{Substance with the ketone group reduced to an alcohol: } \text{HCOOH}. \]

Concluding Statement: Compounds \( A \) and \( B \) align with:

\[ \boxed{\text{Option C}} \]