Students were always and constantly asked to
look at the tube to observe any detectable change in the
tubes. Typically, most students conclude that Benedict’s
reagent can be used to detect sugar, due to the fact that
the samples containing sugar (biscuit, normal but not light
soda, etc) have an orange precipitate. Regarding the sugar
(i.e. sucrose), the results varied probably depending on the
degree of contamination with glucose or fructose in the
samples used.