 Dear student, today we are going to perform iodine test for polysaccharides. Iodine test is mainly performed for the detection of carbohydrate among which sugar and starch are the main source of carbohydrate present in our food. So let's start with the experiment. The material required for this experiment is tissue paper which we will use for the drying of our food sample, distal water which we will utilize for the washing of our food sample, iodine solution, glass fatty plate, a sharp knife, a dropper and a potato and a plastic ball. Let's begin with our experiment. In the very first step we will take a potato and wash it with distal water. After washing this potato now we will dry this potato with the help of tissues. Once we are done with the drying of potato now we will peel off the potato. After peeling the potato well now we will cut the potato into very small pieces. As you can see that we have converted the potato into very small cubes. Now we will pour iodine solution on these small pieces of potato with the help of dropper. We will pour iodine on potato cubes. Now close the lid of iodine solution bottle. After pouring the iodine solution on the small cubes of potato now we will place this petri plate aside for three to five minutes in order to observe the color change. Now after three to five minutes we can see that the color of potato has turned into black. Now here the question arises that what is the reason behind this color change? The answer of this question is quite simple. As we know that starches are made up of amylose and amylopectin. When we add iodine on starch the iodide ion of iodine intercalate with amylose and form a linear triode complexes which ultimately produces the dark black color which we can easily observe in the pieces of potato. In the end I would certainly like to recommend some of the precautions during this experiment. Among those precautions the very first is do not forget to wear hand gloves, wearing of lab coat, avoid to contact any sort of reagent with your hands and body and in the end discard every material consumed properly. Thanks.