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Sticky Note
When aldehyde reacts with 2,4- DNP and Tollen's agents , Positive result in seen. Which compound also gives same results?
  1. Ketone
  2. Alcohol
  3. Ester
  4. Acid
Explanation

Based on the reactions, the compound that also gives a positive result with both 2,4-DNP and Tollen's agents is Ketone

2,4-Dinitrophenylhydrazine (2,4-DNP) test:

This test is used to detect the presence of a carbonyl group (C=O).

Both aldehydes and ketones have a carbonyl group, so both will give a positive result, forming a yellow, orange, or red precipitate

Tollen's test:

This test is used to differentiate between aldehydes and ketones.

Aldehydes:

Give a positive result with Tollen's agent because they are easily oxidized to form a carboxylic acid.

In this process, the silver ions (Ag^+) in the Tollen's reagent are reduced to metallic silver (Ag(s)), which forms a characteristic "silver mirror" on the inside of the test tube.

Ketones:

Generally do not give a positive Tollen's test because they cannot be easily oxidized.

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