What is the chemical test for IODINE?
If it’s elementary iodine (the element) the best test is to put it on starch and the starch will turn blue-black where the iodine comes into contact with it. If it’s in iodide form, such as sodium or potassium iodide, add some chlorine water and if it contains iodide ion, the solution turns brown due to free iodine being liberated. To be sure it’s iodine and not bromine, add a little carbon tetrachloride or chloroform, and if it’s iodine, it will color the carbon tetrachloride purple.
