questions relating to benedicts test and lugols iodine test

Consider these two stories, you may be able to help Vicky and Bill out... 1. Ms. Vicky works at a day care center. In order to save money, they buy everything in bulk and then transfer some of the product to smaller containers. In general, they use comstarch to keep babies bottoms dry, however, if a child is allergic to corn, they will use talc (which is a ground up mineral composed of hydrated magnesium silicate). Apparently, someone transferred talc and comstarch but forgot to label the containers. Your job will be to help Ms. Vicky differentiate between these two powders. Which assay would be most useful in helping you tell apart starch from talc? Explain your answer. 2. Not far away, Bill, who is diabetic, ordered sugar-free (diet) soda. However, he thinks it tastes kind of funny and suspects it might not be diet soda after all. Regular soft drinks most often contain fructose and sucrose. Your would be most useful in thermine which soda pop is the diet one and which one is the regular one. Which assay would be most useful in helping you differentiate between the regular and the diet soda? Explain your