Sunday, January 20, 2008

Tests for Organic Compounds having Carbonyl groups

IIT JEE Chemistry

Tests for Aldehydes, Ketones and Carboxylic Acid

1.Tollens reagent - Aldehydes form silver mirror, Ketones do not
2. Fehling's solution test - Aldehydes give red precipitate, Ketones do not.
3. Schiff's reagent test - Aldehydes give pink colour, Ketones do not
4. Reduction with LiAlH4 - Aldehydes form primary alcohols, Ketones form secondary alcohols
5. Reaction with alcohol and dilute HCl - Aldehydes give acetals, Ketones do not give ketals.

Ester test

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