61. A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? A.From brown to blue-black B.From brown to orange-red C.From blue to pink D.From pink to blue-green
Answer: Option A Solution: The Iodine test is used to test for the presence of starch. Iodine solution — iodine dissolved in an aqueous solution of potassium iodide — reacts with the starch producing a purple black colour.
