Question

Boiled rice ,
Gives blue-black colour when iodine solution is added. or
Gives purple colour when two drops of copper sulphate solution and 10 drops of caustic soda is added to it.or
Oil stains are seen when rubbed on paper.​

Answer 1

Answer:

Yes so,,,,

rice shows starch

Answer 2

Tests to Check for Nutrients

We can test ingredients and food items to check the presence of one or more nutrients.

The tests for carbohydrates, proteins, and fats are easy to perform.

For carrying out these tests, we need solutions of iodine, copper sulphate, and caustic soda. Clean test tubes and a rubber dropper are also needed.

Testing different food items to see if they contain carbohydrates. There are many types of carbohydrates.

The main carbohydrates found in our food are in the form of starch and sugar.

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