Using iodine solution, Biuret test, Benedict reagents and ethanol, respectively in testing for reducing sugars, which of the following trends of colour chan...

Answer Details

The trend of colour changes observed in testing for reducing sugars using iodine solution, Biuret test, Benedict reagents, and ethanol are: - Iodine solution: Blue → black (presence of starch) - Biuret test: Blue → violet (presence of proteins) - Benedict reagents: Blue → brick red (presence of reducing sugars) - Ethanol: Milky (presence of fats) Therefore, the trend of colour changes that would be observed when testing for reducing sugars is brown → blue → brick red → clear, corresponding to the colour changes in the Benedict reagent test.