Name Section Date IV. KREIS TEST FOR OXIDATIVE RANCIDITY Color observations and

Question

Name Section Date IV. KREIS TEST FOR OXIDATIVE RANCIDITY Color observations and conclusions: V. BROMINE TEST FOR UNSATURATION 1. Data: Lipid Commerical Solid Shortening Commercial Liquid Shortening Number of Drops of Br, solution 2. a. Which of the shortenings tested is the more unsaturated? b. Which may contain more trans fat? Do the results obtained here help you answer that? 3. With cholesterol, what functional group was detected? How does it happen that the name "cholesterol" doesn't indicate presence of this group? . CLEANSING PROPERTIES OF SOAP AND DETERGENT 1. Data for Steps 1 through 3 Amount of Foam Produced Amount of Foam Produced with Detergent Solution Added with Soap

Explanation / Answer

extent of unsaturation can be estimated based on the addition of Bromine/Iodine. in the question, Number of drops of Br2 for both the types of shortening is not mentioned.

Actually Br2 will react with the double bonds present in the fats and oils.we can tell that, if more double bonds are there, i.e if more unsaturation is present, more Br2 will be used up.orange- brown solution of diluted bromine will became colour less when it reacted with unsaturates.

more transfats will be availabe with oils .

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