A compound 'A'with molecular formula \({C_5H_{10}O}\)gives a positive \({2,4-DNP}\) test but a negative Tollen's test. On treatment with sodium hypochlorite, it gives \({CHCl_3}\) and compound 'B'. Compound 'B' is
The correct answer is option (b): Sodium butanoate
Positive 2,4-Dinitrophenylhydrazine (\({2,4-DNP}\)) test: Compound 'A' gives a positive \({2,4-DNP}\) test, indicating the presence of a carbonyl group, which could be either an aldehyde or a ketone.
Negative Tollen's test: Compound 'A' does not give a positive Tollen's test, which suggests it is not an aldehyde.
Reaction with sodium hypochlorite (\({NaClO}\)): Compound 'A' reacts with sodium hypochlorite to give chloroform (\({CHCl_3}\)) and compound 'B'.
Based on the information provided, compound 'A' has a molecular formula of \({C_5H_{10}O}\) and contains a carbonyl group. One possible structure for compound 'A' is the ketone "2-pentanone" (\({CH_3COCH_2CH_2CH_3}\)).
Now, let's consider the formation of compound 'B' upon treatment with sodium hypochlorite:
The reaction between 2-pentanone (compound 'A') and sodium hypochlorite yields chloroform (\({CHCl_3}\)) and compound 'B'. Given the options provided, "Sodium propanoate," "Sodium butanoate," "Sodium acetate," and "n-Butane," the most likely choice for compound 'B' would be "Sodium acetate" (\({CH_3COONa}\)).
So, compound 'B' is likely to be "Sodium acetate" (\({CH_3COONa}\)) based on the given information.
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Top Questions on Aldehydes, Ketones and Carboxylic Acids
Aldehydes, Ketones, and Carboxylic Acids are carbonyl compounds that contain a carbon-oxygen double bond. These organic compounds are very important in the field of organic chemistry and also have many industrial applications.
Aldehydes:
Aldehydes are organic compounds that have the functional group -CHO.
Preparation of Aldehydes
Acid chlorides are reduced to aldehydes with hydrogen in the presence of palladium catalyst spread on barium sulfate.
Ketones:
Ketones are organic compounds that have the functional group C=O and the structure R-(C=O)-R’.
Preparation of Ketones
Acid chlorides on reaction with dialkyl cadmium produce ketones. Dialkyl cadmium themselves are prepared from Grignard reagents.
Carboxylic Acid:
Carboxylic acids are organic compounds that contain a (C=O)OH group attached to an R group (where R refers to the remaining part of the molecule).
Preparation of Carboxylic Acids
Primary alcohols are readily oxidized to carboxylic acids with common oxidizing agents such as potassium permanganate in neutral acidic or alkaline media or by potassium dichromate and chromium trioxide in acidic media.
