Osmic acid boiled with a solution of food substance gave a black precipitate. This indicates the presence of

Assessment: JAMB UTME - Biology - 1993 Subject: Biology

Question 1 Report

Osmic acid boiled with a solution of food substance gave a black precipitate. This indicates the presence of
Answer Details
The presence of a black precipitate after boiling a solution of a food substance with osmic acid indicates the presence of fats and oils. Osmic acid is a chemical reagent that is used to detect the presence of unsaturated lipids, such as fats and oils, which react with osmic acid to form a black precipitate. This reaction is a specific test for the presence of fats and oils and is commonly used in food analysis.
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