Question

how will you test protein in a given example of food items?
1)potato
2)rice

Answer 1

Answer:

According to the question we have to

test protein in potatoes and rice.

Here is the following process,

We have to take a small amount of the food items to be tested.

Grind/mash/paste/powder the food item.

Put the food item into a test tube.

Add 10 drops of water.

Shake the test tube.

Using a dropper add two or three drops of copper sulphate solution to the test tube.

Add 10 drops of caustic soda solution and after that shake the test tube gently.

Next we have to observe the colour of the mixture very carefully.

If it becomes Violet colour that is the indication of the presence of proteins in the tested food item, here in rice and potato.