AIIMS 2019 Chemistry Carbohydrates MCQ Question
Starch is a polysaccharide and on reaction with iodine it will give a blue-black color.
True
False
Correct Answer
Detailed Explanation
Starch is a polysaccharide composed of glucose units linked by α(1→4) and α(1→6) glycosidic bonds, and it forms a complex with iodine, resulting in a characteristic blue-black color. This reaction occurs because the iodine molecules fit into the helical structure of amylose, a component of starch, indicating the presence of starch in a sample. Options B, C, and D are irrelevant or incorrect because they do not accurately reflect the well-established chemical reaction between starch and iodine.
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