Chemistry - Redox Reactions Question with Solution | TestHub

Starch ${\left({\mathrm{C}}_6{\mathrm{H}}_{10}{\mathrm{O}}_5\right)}_n$ is a polysaccharide. It consists of two fractions - one is known as $\alpha$ amylose and the other is $\beta$-amylose or amylopectin. In iodimetric and iodometric titrations, starch solution is used as an indicator. It gives blue or violet colour with free iodine. At the end point the blue or violet colour disappears when iodine is completely changed to iodide.