Iodine is most commonly used in science to test the presence of starch in food. In water, it is an orangish\brown colour but if you put it on a food that contains starch it will turn a darkblue\black colour. For example, if you put it on bread, it will turn darkblue\black.
Iodine is most commonly used in science to test the presence of starch in food. In water, it is an orangish\brown colour but if you put it on a food that contains starch it will turn a darkblue\black colour. For example, if you put it on bread, it will turn darkblue\black.