Will iodine react with sucrose or glucose? I would say no, because it reacts with starch, a polysaccharide, and glucose is a monosaccaride and sucrose is a combination of fructose and glucose, two monosaccharides. Am I right? Why or why not? How does iodine cause a reaction to starch? Thanks!

Answer 1

When iodine iw dissolved in an aqueous solution of potassium iodide — it reacts with starch producing a purple black color.

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