WAEC - Biology (2002 - No. 30)
Using iodine solution, Biuret test, Benedict reagents and ethanol, respectively in testing for reducing
sugars, which of the following trends of colour changes would be observed?
sugars, which of the following trends of colour changes would be observed?
Blue → black → blue → brown → clear
Brown → blue → brick red → clear
Brown → violet → blue → clear
Brown → blue → violet → milky