Question

Q-3. Which of the following test tubes indicate the presence of protein blue covared or violet coloured ?​

Answer 1

Answer:

Biuret Test

Add 2-3 drops of CuSO4 solution to the test tube containing egg albumin. Shake the solution to mix it well. A violet colour appears in the test tube, which indicates the presence of proteins.

Explanation:

Answer 2

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Iodine test is used to determine the presence of starch in food items. If iodine is added to any food item and it causes the food item to turn to a blue-black colour, it indicates the presence of the nutrient called starch (carbohydrate).

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