What is iodine solution changing from amber-yellow to blue-black an indication of? a. the presence of reducing sugars or monosaccharides b. the presence of proteins or peptide bonds c. the presence of lipids or fats d. the presence of starches or complex carbohydrates submit for grading save and finish later?

Iodine solution is prepared by dissolving iodine in a solution of potassium iodide. This iodine reagent is amber-yellow colored. When this iodine solution is added to starch solution which is a polysaccharide, the yellow colored reagent changes to blue-block color. This color change is due to the formation of a charge transfer complex between starch and the triioidide present in iodine solution. So, the correct answer is d. the presence of starches or complex carbohydrates

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the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.