Can iodine be used to test for carbohydrates?

No, iodine is not used to test for carbohydrates; it is primarily used to test for the presence of starch, which is a specific type of carbohydrate. When iodine solution is added to a sample containing starch, it typically produces a blue-black color. For testing other carbohydrates, such as sugars, different reagents like Benedict's solution or Fehling's solution are used.