Question

which indicates the presence of protiens in the food item​

Answer 1

Answer:

Food Test 2: Protein - Biuret solution

Biuret solution is used to identify the presence of protein. Biuret reagent is a blue solution that, when it reacts with protein, will change color to pink-purple.

Answer 2

Answer:

Biuret solution test. If the solution changes its color to pink or purple

Explanation:

Another easy way is as follows:-

The following steps are performed to test the presence of protein in a food item.

Take a small quantity of the food item to be tested.

Grind the food item and powder it by mashing .

Put the food item into a test tube.

Add 10 drops of water into the same test tube.

Add two drops of copper sulphate solution to the same test tube.

Add 10 drops of caustic soda solution and shake the same test tube.

Observe the colour of the mixture.

Violet colour indicates the presence of proteins in the tested food item.