Question

Which indicator is used to check for the presence or absence of simple sugars?
What indcates the presence of simple sugars in a solution?

What indicator is used to check for the presence of starch?
What indicates the presence of starch in a solution?

Answer 1

Here are two sites. The first one describes the test with Benedict's solution for simple sugars. The second one describes the iodine test for starch.
http://www.sciencecompany.com/sci-exper/food_chemistry.htm

http://www.elmhurst.edu/~chm/vchembook/548starchiodine.html