Question

Write the test to show the presence of protein in any food item

Answer 1

Explanation:

Put the food item into a test tube. Add 10 drops of water and shake the test tube. Using a dropper add two drops of copper sulphate solution to the test tube. ... Violet colour indicates the presence of proteins in the tested food item.

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Answer 2

Explanation:

Following steps are used to test if a food item contains protein.

1) Take a small quantity of the food items to be tested.

2) Grind/mash the food item.

3) Put the food item into a test tube.

4) Add 10 drops of water and shake the test tube.

5) Add two drops of copper sulphate solution to the test tube, using a dropper.

6) Add 10 drops of caustic soda solution using a dropper and shake the test tube.

7) Let the test tube rest in a test tube stand for a few minutes.

8) Observe the colour of the mixture.

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

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