NURSING ANM AND GNM

Detailed explanation-1: -Fructose and sucrose are two common sugars which give a positive test. Sucrose gives a positive test as it is a disaccharide consisting of fructose and glucose.

Detailed explanation-2: -The formation of the cherry red-colored complex indicates a positive result which means that the given sample contains ketoses. The absence of such color or the appearance of the color after a prolonged period of time indicates a negative result which means that the test sample doesn’t have ketoses.

Detailed explanation-3: -Final answer: A positive Seliwanoff’s test is obtained with fructose.

Detailed explanation-4: -A positive test consists of a color change from red to yellow, indicating a pH change to acidic.

Detailed explanation-5: -Seliwanoff test is a chemical test which distinguishes between glucose and fructose. This test is based on the fact that when heated, fructose(ketose sugar) is more rapidly dehydrated than glucose(aldose sugar). When added to a solution containing fructose, a red color is formed rapidly.