Question:

Few simple chemical tests are given below to differentiate between the pairs of compounds. Which of the following tests is not correct for differentiation?

Updated On: Sep 26, 2023
  • Propanal and propanone - Silver mirror test
  • Acetophenone and benzophenone - Iodoform test
  • Ethanal and propanal - Fehling?? test
  • Benzoic acid and ethyl benzoate - Sodium bicarbonate test
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The Correct Option is C

Solution and Explanation

Both ethanal and propanal will give silver mirror test and red precipitate with Fehling?? solution. They can be differentiated by iodoform test.
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Top Questions on Aldehydes, Ketones and Carboxylic Acids

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Notes on Aldehydes, Ketones and Carboxylic Acids

Concepts Used:

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.