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Question

Which of the following compounds will react with Tollen's reagent ?

A
CH3COCH3
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B
HCOOH
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C
CH3COOH
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D
CH3CH2CH3
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Solution

The correct option is B HCOOH
Tollen's reagent oxidizes an aldehyde into the corresponding carboxylic acid but do not respond to ketone and alkane.
Formic acid give Tollens' and Fehling's tests while other carboxylic acids ​do not due to the presence of aldehyde bond that can be oxidized further in the presence of mild oxidizing agents like Tollens' and Fehling's reagents. Thus correct option is (b).

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