Question

question 7
part 2;
d: you are trying to identify an unlabeled container of yellowish jelly - like substance from your refrigerator. it is either

• an aspic (jello type stuff made from gelatin which)
• a fruit chutney (contains reducing sugar and starch)
• a meat glaze (contains protein and starch).

you test the substance with some of the tests you are shown below. fill in the blanks in the table and
test used result observed
benedicts turned red
iodine turned black
biuret remained blue
the substance is fruit chutney

Explanation:

Step1: Analyze Benedicts test result

A positive Benedicts test (turned red) indicates the presence of reducing sugars such as monosaccharides.

Step2: Analyze Iodine test result

A positive iodine - starch reaction (turned black) indicates the presence of starch.

Step3: Analyze Biuret test result

A negative Biuret test (remained blue) indicates no proteins are present.

Step4: Identify the substance

Since the substance has monosaccharides (from Benedicts test), starch (from iodine test) and no proteins (from Biuret test), it matches the description of fruit chutney.

Answer:

The substance is fruit chutney.