Question

How can you prepare a dilute solution of iodine

Answer 1

dissolve potassium iodide in about 200 cm3 distilled water and then add iodine crystals make the solution up to 1 litre with distilled water. it is essential to prepare it 24 hours before it is required as iodine is slow to dissolve

Answer 2

$\huge\red{Answer}$

• Take a test tube or a cup add few drops of iodine crystals to it.Then dilute it with water till it becomes light yellow/brown.
• Take a sample of food item in the test tube.Add a few drops of dilute iodine solution to the sample.
• Observe the change in colour.What do you find?
• If the substance turn dark blue or black it contains starch.Try with ripen banana and curry banana.