Answer the following questions: 1. Rohan performs Iodine test on a food sample. He observes that the food sample changes colour to blue-black. For which component of food is Rohan performing the test. What can he conclude from the colour change? 2. What are the different ways in which body loses water? What is dehydration?
Answers
Hey mate here's your answer.please mark it as brainliest and give it a thanks and 5 star please brother.
*Test for starch
Take the food sample.
If it is a solid crush it using a mortar and pestle.
Add water and mix it.
Crush the sample until it turns into a semi-liquid state
Add brown iodine soln.
If the liquid on addition turns blue-black there in presence of starch
Test for protien
Take a small quantity of the food items to be tested.
Grind/mash the food item.
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.
Add 10 drops of caustic soda solution and shake the test tube.
Observe the colour of the mixture.
Violet colour indicates the presence of proteins in the tested food item.
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